My baby is now 6 months so I'm not even sure if it is termed postnatal at this point, but I am anxious about him all the time. I am generally an anxious person anyway, but I managed it well til I had him. I don't think the covid situation helps, of course.
He has just started eating solid food so I watched a video about what to do if a baby chokes, and I just burst out crying because the thought of something like that happening to him is just so awful. I have so many intrusive thoughts of things happening to him. Weirdly, I feel ok about leaving him with others eg my MIL will take care of him for an evening once he's asleep. Sometimes I wonder if it's more a confidence issue, that I don't know how to take care of him properly.
I don't live in the UK and mental health treatment is not good where I live so I can't really see a doctor.