How to use feelings and emotions as tools (or to stop feeling them)?

Long story short, I am in for hell. Believe it or dont, but I was framed for something so well that it looks like Im going to prison for something that will not make me many friends, to say the least. Its not disprovable, and the circumstantial evidence looks damning. This involves a nurse who had access to all of my personal information, DNA, and is lying completely about my character. I dont have any more options and can't afford a PI or even a decent lawyer.

Ive acceoted my fate. It will be bad. Im experiencing the beginning of intense anxiety and heartbreak that will only get worse. I dont know how to handle this. I suppose there will be a prison therapist but she likely won't believe a word I tell her. Ill be nothing but an inmate, after all. A rare, actually innocent inmate.

What can I do to conquer or manage this? When I think about being falsely accused, framed, and publicly humiliated I start to have panic atacks. I dont know what Im going to do once I lose access to my distractions and vices. Please help.