Weird cramping ??

So, y’all know those pains you get when you really have to go to the bathroom right?? Well, I had a pain kinda similar to that... in my lower abdomen, into my pelvis. And moving made it worse. As long as I’m sitting I’m okay. But movement makes the pain come back. 👀 I’m not constipated, as I’ve actually had antibiotic induced diarrhea for the past week and a half... and I did go tonight. It actually kind of started last night, but it went away after a while. I’m not pregnant, that I’m aware of. (Even if I was, I wouldn’t be far enough along for it to be causing pains or other symptoms as I’m only like 3-4dpo) it’s making me a little nauseous, too. Any ideas?? I don’t think it’s ER worthy because it comes and goes and isn’t severe really. (But if it does get worse, I will go.)