Cramping and confused....

Hello all! Im currently in my first month TTC my first baby. I'm 4 DPO and all day I've had weird pelvic cramping. Kind of like I'm getting AF but it's way early for that. It's a weird muscle spasm feeling too, not like traditional menstrual cramps. And it's not super painful, just kind of annoying. I feel fine otherwise, no pain during sex and it doesn't hurt when I pee. I thought maybe it was from working out, but it feels different than muscle soreness related to doing an ab workout.

Anyone have any insight?