I had quite bad postnatal anxiety after the birth of my son. For me, the intrusive thoughts were the worst, mainly centering on horrendous 'what if' scenarios ('What if I went mad and hurt him?' 'What if I crashed the car when I'm with him?'). It was incredibly difficult to relax and I was always on edge. But when I spoke to my GP about it they said I was fine but I knew I wasn't. Because I didn't have postnatal depression, they didn't seem to care.
I know many new mums feel this way and just wish the health care system recognised it better so that I could have enjoyed those first months more than I did.