Period cramps at 20 weeks??

. I literally have cramps EXACTLY like my period is gonna start. Almost like I have to poop but pooping doesn't help But definitely period cramps. I'm really scared. They're not extremely painful, but typical period pains painful enough that I wanna take tylenol. They're constant too, not coming in waves or anything and not getting any better. And I have a lot of white and clear discharge which is normal I guess. I guess I'm just scared because it feels literally identical to my period. Like it hurts. and I keep expecting to go to the bathroom and have my period lol. the pain is even radiating down to my legs and my back. But mostly on the left side.