I would say what you are describing might be excessive. You might be having some depression/anxiety issues caused by hormones. I would definitely take advantage of a mental health professional. That way you can have someone to talk out your fears with in a neutral setting. Last pregnancy I had crushing anxiety that affected my ability to sleep. I kept it to myself until right before delivery when I had the worst panic attack ever. It was awful and I wished I had said something to my doctor to get some help sooner.
You aren't crazy and there is nothing wrong with you-- its just chemicals that are making you feel awful. Also, if you don't already I would limit caffeine and other stimulants. Good luck, but please reach out if you need to.