This is very understandable and I felt like this after my first (also a traumatic birth). There's a lot to feel overwhelmed by: processing what you have been through, dealing with hormonal changes and the recovery from birth and caring for a whole living being. I cried a lot in the first two weeks after my first was born and I did have a lot of anxiety too, luckily this did pass with time (and when I was no longer so sleep deprived I was hallucinating). But there were things like the birth that took longer to recover from emotionally. It can be good to talk to the midwife/ health visitor about how you are feeling.
I also felt like this after my first but not with my second - it’s massively overwhelming first time round with the hormones, recovery and huge shift in lifestyle change! Be kind to yourself and say yes to help/ resources if you need them x
I’ve never experienced anxiety like it! I’m not an anxious person but it’s been really tough. I found it has improved with a few more hours sleep in the day, asking my partner to take on some of the feeding and getting out of the house for a walk.