I get that sometimes when I haven't had a bowel movement in a few days. I've been drinking lots of water and eating fiber one bars when I feel up to it and that seems to help. I'm 12w1d.
My doctor told me that I should take something like FiberCon everday to keep from getting constipated. You may have to try something and see if it works for you.
I genuinely had to take stool softeners to get everything regulated in the beginning of my pregnancy. It probably is gas and if you get the right kind of stool softener, it'll help with gas problems as well
Could be gas it causes cramps for me when I try to push too. or constipation