Postpartum

I feel stupid for asking this, but my anxiety level is through the roof when anyone besides me takes care of my 2 year old and my 6 month old twins. My husband has surgery on Monday and the kids are going to spend a few days with grandma and grandpa. I am sick with worrying so much. I literally run through every single situation that could possibly go wrong. Is this postpartum depression or a normal mom thing?