having a lot of problems trying to work with anxiety

i have had really bad anxiety since i turned 20, whenever I go to a job, i get excited about working and earning a living but then about 30 minutes into it. I feel out of it like I need to get out and make it back to one of my safe zones. I dont know if this is agoraphobia or social anxiety or what, I am currently on 200 mg of zoloft a day, 900 mg of gabapentin and 15mg 3x daily of buspar. I just dont know what to do any more, I feel like I have tried everything. Even if I make past the 1st day of work, Im so worked up with anxiety I mentally cant go back. Appreciate all feedback with someone in my situation! thanks