Postpartum anxiety?

Hi all. I’m wondering if I may have postpartum anxiety or if it’s just normal mum worries, or if it’s just general anxiety? I have taken sertraline for years due to generalised anxiety and ocd. I worry about every little thing with my baby e.g someone held him and didn’t support his head the best whilst lightly jiggling him and I’m worried he has shaken baby syndrome. I noticed his fontanelle looked maybe slightly sunken and convinced myself he was really dehydrated. It’s just one anxiety after another. Could this be PPA? Any advice or tips welcome. Please be kind, thank you x