No one needs to live with this level of anxiety and confusion. I’m so sorry you are feeling so distressed.
The simple answer to your question is “yes”. You should seek an evaluation from a mental health counselor. I can’t tell on the basis of your letter if your issues rise to the level of a mental disorder. But a professional can. If you need treatment, the counselor will give you suggestions for next steps. If you don’t need treatment, you will at least get peace of mind, knowing that you are one of the “worried well” people who, like everyone, needs to learn how to better manage social interactions. The counselor can also give you some suggestions for that.
I wish you well.