different pain!!

So please don’t judge Ik it wrong and I should’ve used protection.(on birth control)

I had sex about 9 days ago and I started having pain to my lower stomach and back......Like really bad it been happening for 2 days and I just woke up this morning to a lot of bleeding and like (tissue?) umm help I’m confused but it’s still going on😖

One of my friends said “I might have been pregnant”. Just tell me what u think I’ll listen