Extreme abdominal pains

TMI kinda

So on and off the past two weeks I’ve been having this extremely bad abdominal pain starting at my belly button and lower. It almost feels like a late labor contraction but I’m not pregnant that I know of. My period is 5 days late, but it’s not regular to begin with. The pain wakes me up from my sleep and is so bad I can’t move. Afterwards I have to use the bathroom. At about 6 every night I get extremely bloated and even nauseous. Does anyone have any idea what it could be? Does anyone else get that issue?