Cramping with IUD

This Sunday I will be one year PP. I got my first IUD about five months PP. A few weeks ago I made a movement and felt a pain in my abdomen, best way to describe it is it felt like round ligament pain. After a week it went away. A few days ago it happens again. It not a big movement, just a reaching to the side movement (I am stretching when I do it).

Last time I had sex was Thursday, today’s Monday and I had some thick, white mucus discharge. Had abdominal pain since Thursday afternoon, hence the no sex since.

Thoughts on what it is? Pulled muscle? Pregnancy? (Thinking of getting a test tomorrow to be safe) I’m still breastfeeding so I haven’t had my period yet so I can say if I’ve missed one.

Just wondering if this normal with an IUD as I’ve never had one. Thanks for letting me vent ladies! ☺️