Is Vaginal Bleeding A Common Symptom In Women Taking Provera Tablets?

Hello doc, so I think I’m pregnant but I’m on the Depo Provera. I may I was was having unsafe sex and took my morning after 2/3 days later. I would repeatedly do that. Then I notice I was bleeding for 1 week after taken the pill. Meanwhile I was still having unprotected sex while I was bleed and he would continue cum inside me. In June I went on the shot and I’ve bleed for 5 months, some days no blood bit when I bleed it’s dark. Prior to that I have back pain, I throw up a lot, I have a heavy appetite, headache but I only have pain on the left side of my tummy and now it move to the back. Only my belly is getting big