I'm not bipolar but I have some problems with paranoia that I don't know how to deal with. I was wondering if anyone could help and give me advice on how to calm it down and maybe not lose trust in my family/friends because of it.

I've thought there was someone hiding under my bed. I was convinced my mom was going to try to sedate me when I couldn't sleep. I was put on a medication for mood swings but I refused to take it because I thought it would kill me. 

Any advice would be great