I think I had a miscarriage today

Yesterday I got these awful pains like a scalpel scraping but I just decided it was cramps. When I woke up earlier I was cramping and my back was hurting sooo bad I felt like I had to shit I went to the bathroom and pushed for 10 mins almost crying bc of how bad it hurt but I couldn’t do anything so I just wiped and noticed it was bloody I look down Nd the toilet was almost black from blood. I looked to see if I was supposed to start my period bc it felt early. I’m not supposed to have a period for 6 days. I told My sister. She asked me was I have a miscarriage. I called my partner and told him and he thinks I had one too. I’ve been crying, I’m so sad. I used to be on depo and thought it had made me infertile so to think I just had a miscarriage has me extremely emotional.