Has anyone ever experienced weird pains in their uterus area, not like period cramps, more random than constant and sharp rather than aching. I had these cramps followed by 1 day of (I wouldn't even call it spotting more like) a dot of blood that was brownish but that's it.

It almost feels like I have held in my pee too long and it hurts like that feeling (obviously not that lol) but in my uterus area. (Sounds weird I know) The spot of blood was today. My period is due in 5 days. I am not on BC so it's not that. Any suggestions? Is this normal ?