I need opinions

So lately I’ve been having anxiety, and I’m gonna talk to my doctor about it. But I’m scared it’s bigger than anxiety. I get scared all the time, that someone’s put something in my drink, in my car, or that people are just out to get me. I don’t really trust anyone anymore, (including family) and it’s hard for me to think it’s just anxiety. I’m only 22 years old, and I haven’t ever done drugs. I don’t drink either, because it makes my chest really tight, and just worsens my thoughts about this. I really would like others opinions and what could be done to help. To me I’m worried it could be an early stage of paranoia or schizophrenia.