I've always been sensitive to hormonal fluctuations but never more so than after having DC2. Her birth was traumatic and I suffered with alot of postnatal anxiety (alongside being diagnosed with PTSD) and I was a bit of a nervous wreck for some time / panic attacks / feeling not quite right / sense of constant impending doom and not being able to relax.
I got better eventually, over time, and years later we decided to have DC3 who is now a couple of weeks old. I was dreading the postpartum stage but felt confident I'd be ok this time providing all went well with the birth (and it did)
But low and behold, the postnatal anxiety is back with a vengeance. I've had 3 panic attacks this week and feel familiarity out of sorts. I keep reminding myself that this too shall pass but jesus, it's not nice 
AIBU to think that as unpleasant as it is, it's actually very common? Can anybody relate?