Bluish Purplish Back marks on Boobs

Cierra

I have bluish purplish black marks on my boobs and boobs literally hurt. The guy I was with was squeezing, sucking and etc on my boobs and when I went to go take a shower, I saw these marks and colors on my boobs and I got scared. Does anyone know what this is? I'm kind of nervous cause my boobs hurts. HELP!