Can panic/anxiety symptoms come up delayed, like way delayed? I had extreme stomach pain, due to stomach wall irritation (didn’t know what it was at the time) and visited the ER. I was handling that pretty well at the time all things considered. After the visit i got some meds for it and it slowly got better and still no panic or anxiety. Now, five days later, i get my first anxiety attack after what has been like half a year of mostly anxiety free. Sucks, but not too bad. Though i am confused, shouldn’t i have got this at the event and not so long later? Did this happen to any one of you?