One sided cramping

Makenzie

I’m 33w5d with my first baby. Last night I woke up to horrible heartburn & noticed really uncomfortable cramping in my lower right side. I got up, peed, & laid back down where it came back. I only felt it once more since I woke up this morning but have also noticed my little one was kicking me pretty good while that cramping was going on. I haven’t felt much of her except for a twinge or two. What could this be & what should I do?