Weird period pains..? answer asap ???

Titta • 27 years 🦂 With 2 perfect daughters 💕
So I'm on day 3 of my period. To start off, every time I change a tampon there's a decent amount of uterine tissue on it. 
I laid down on my side and it felt like I was pregnant..it felt like a ball was there..super uncomfortable.
I flexed my stomach or something while moving and it hurt really bad like I can't suck in without it hurting. My stomach hurts to touch! 
Am I just like super bloated or something? I'm worrying myself cause the Saturday before I got my period (Saturday the 5th/period on the 10th) my boyfriend came in me.