yeah i agree with ez. it sounds like you are going through a hard time right now, and it seems as though your anxiety has kicked it up a notch!

when you get all of these questions floating about your head - you need to accept them as anxiety and try and move forward.
i know when my anxiety is in full swing, i feel like what you are describing and more.

i find that my anxiety gets like that, when i don't deal with it as soon as i detect it.

it can take weeks to build up to this, sometimes even months.
i might feel anxious about something stupid one week, then something else the next week. etc. then i will start feeling anxious about things on daily basis - then i feel as though i am losing all control of everything and that's when the questions start coming. about everything - my sanity especially!