Stitches / sharp cramps: 14w5d

Hi, yesterday, my 22kg 6yo was screaming coz his feet burned on the hot dry floor at the wet theme park so i carried him for about 300m until there’s cooler floor. I’ve been feeling frequent but short sharp pains around my stomach like stitches or cramps. I don’t know if it’s related to carrying my son or something else or nothing to be worried about. I’ve had 2 miscarriages before this. I’ve been very careful this time - plus I’ve been weak & tired so i haven’t carried heavy things or overloaded myself. Can someone assure me that they carry heavy things and things turn out ok?