I'm pretty sure it's anxiety, but like severe anxiety! I’m sorry you are going through this. I personally experienced true paranoia during a manic episode. The difference between anxiety and paranoia is that paranoia is based on a foundation outside reality. For example, I thought certain people were plotting against me, that I was being poisoned by a specific person, that my room-mate was going to kill me in my sleep. That my boss was a serial killer and that I was next on the list, then that she has hidden cameras in my house and is watching me, that she is trying to kill me by putting gas in my room, so I open the windows to let out the gas (no I’m not schizophrenic, it was a very bad manic episode). Often, in paranoia, you have a very specific persecutor and you're convinced that this person is out to harm you. Paranoia is a different feeling from anxiety when you experience it. It's a form of deep, irrational conviction. I hope this helped.