Excessive bleeding

Hi y’all. I need some advice. In the month of January I went a total of SEVEN days WITHOUT bleeding. My doctor had put me on naproxen twice a day for a week to “stop” the bleeding, and wasn’t concerned about it. That was two weeks ago. In those two weeks I have been bleeding for nine days. Extreme lower back pain and it hurts behind my pubic bone. I don’t have my std’s (was just tested). But what would y’all do? I feel like I’m bleeding way too much. I can feel myself getting weaker, more tired, and I’m barely eating because the cramps are so bad.