Hey,
I feel really awful for you. Around a year ago, I was diagnosed with the same thing, it was awful,
my family would watch crime dramas and I'd be terrified to watch them incase the show aroused me, or gave me ideas. I couldn't cook with anybody in the kitchen for the fear of impulsively stabbing somebody. I couldn't cuddle my partner, as it seemed too easy to strangle her, and the list just goes on.
I was put on Prozac, which made the thoughts so frequent, that I was seriously now convinced I was evil, or just couldn't be trusted, and tried to get myself commited. Thankfully the psychiatrist on call in my local hospital that night saw I didn't fit the description of "Person given up totally on life" or "Homicidal potential" and explained to me the details of intrusive thoughts, and how they worked. My mother was there with me that night, and the look on her face as the psychiatrist repeated what I'd said as he explained things to her was a look I'll never forget.
Skip forwards a few months, and I started Remeron, which did seem to help things a little. I also read A LOT of stuff on intrusive thoughts, and found they had possible links to OCD. Have you had any obsessions, compulsions, rituals that have played a big part in your life? It can often be a symptom of OCD, but nonetheless the treatments are the same.
I spent around 5 months in therapy, dissecting these thoughts, and what they meant, the meanings I gave them, and the underlying fears behind them. This was very useful, and it's crucial to get in some therapy, as it will start to help untangle these thought processes.
Apparently, everybody has these thoughts. I'm sure you and everybody else remembers looking over a steep edge and thinking "what if I jumped? what would it be like?could I do it?" but then dismissed it within seconds and carried on with your day. The problem with people like us, is that we have these relatively normal albeit bizzare thoughts, but our anxiety (being anxiety) causes alarm bells to go off. The same way a hypochondriac gets terrified when they may get an innocent cough, we have these same fears when we have a bizzare thought. Seeing as our mind has now flagged this experience, it's kept constantly in the forefront of our mind, in a desperate attempt to ensure the situation is "resolved" and enough evidence and reassurance to put the thought to rest.
I won't lie to you, it is a tough time. The mind feels alien, the feelings of being evil, or bad, or having this crazy alter ego hiding beneath you, ready to strike any moment it gets the chance, will feel so strong, and so real. It takes time, and effort to get better, and get over this. It will feel some days like all is lost, but it's simply the feeling of a truly
exhausted mind, that needs proper help and rest. It takes a lot of time to untangle these thoughts, and the deeper fears behind them which cause it. A good therapist will help you with this. They will make you so de-sensitized by these thoughts, that when they pop into your head, they will instantaneously bore you, and you'll choose simply to laugh them off, or focus on something more interesting. It took me around 5 months, before I saw things clearly for what they were, this deceiving trick being played by my tired mind. You'll get there too, it's very early for you, they may evaporate completely or they may stick around, but you're in soon, they haven't had a chance to build roots and get even more tangled up, and without meaning to sound like I'm be-littling your problem, they are very minor in regards to what other people who have gotten much better have had to face.
And as for acting upon these? No chance my friend. there are rock solid defense mechanisms in the brain which protect you from this (if you ever have an actual strong desire for suicide, see your doctor, or emergency services, as it's a different problem entirely). Evolutionary mechanisms to ensure things like this don't happen. In fact, seeing as they scare you so much, your body is so on guard for these problems, theres actually less chance of you engaging in something like this, than most random people we meet.
Theres a website called stuckinadoorway. Google it, it's excellent, it talks in far more detail about intrusive thoughts, it's a site for OCD, but touches on intrusive thoughts. I've found it to be very helpful. Secondly, did all of this start after taking the Zoloft? If so, I would definetly reccommend switching over meds. There are so many to try that if you get bad side effects from one, give another ago. Unfortunately some drugs can make people feel worse, and it takes a little trial and error before finding the right dose/med.
Anyway, my heart goes out to you, I know how awful it can be at times, but there really is hope, it gets a lot better, a good therapist will help you so much. Theres no shame or weakness though, if you decide to take things a little easier, maybe avoid hunting if you want, or any situations that evoke these thoughts, just to save you the worry until you've got more of a grip on them, which you'll get. Even as I write this, the remains of my own thoughts are still there, I have a bizzare thought of hitting somebody with my laptop, but I now simply laugh it off in a second and forget it, before I carry on my online shopping and spending quality time with my family! Not bad for somebody that tried to get INTO the "madhouse"

God Bless, and sorry for the long post!