You're not alone! I've dealt w/ anxiety, specifically social anxiety for the last 15 years. The deal is to put everything into perspective, not "overthink" and to get help. Anxietyfree is a good non-drug site. Dr. Melvin green's "living fear free" is a great book as well.
You are probably having all these reactions because the hormones. I've noticed they have made me super sensitive, and that could be a reason why. If you have any questions pm me, and i'd be glad to answer.
Here's a tip, when I get really anxious, I go to a "safe place" in my head. I visualize the waves washing in and out at the beach. I also tell myself to "stop" and go do something useful such as laudry, or other chore like cleaning the shower. Support groups are wonderful, look for one locally. Good luck!!