Todays been a bad day.

So, ive been doing real good for about a week or two. I was diagnosed with postpartum depression and anxiety and today has just really been a bad day for me mentally. They gave me medication but I dont wanna take it. And I dont know why. Something is holding me back. But my relationship is going to start being effected. I literally cry and in a sense, i torture. Things will be going so good. Now today, I'm wondering what hes doing on the phone what hes doing on the computer if hes looking at women in the store. In scared every day. I feel insecure. And I'm doing it to myself. That I know of, he hasn't done anything wrong but every time ive got this feeling, ive found something. I'm terrified. I really hope its just because of this postpartum stuff but its just been such a bad bad day. Ive been so damn irritable and angry and sad all damn day. Advice?

I am 8 weeks postpartum