Nonstop bleeding for months on BC

Having bleeding issues on the pill and need some advice/insight. Does anyone have any similar experiences and what worked for you?

I have been struggling with finding the right pill for like 8 months. The issue is I got on the pill to control the heavy and irregular cycle I had (I was anemic most of the time due to the blood loss). Also my bf and I don't want to have kids so I'm on the pill and he wears a condom every time we have sex.

I've switched formulas 3 times and now I'm on Norethindrone Acetate Ethinyl Estradiol the 21 day pack.

In March I started taking Vylibra (switched from Ocella) and the bleeding never stopped. I had maybe 4 days without bleeding and that was the pattern for March-May 26. On May 31 the bleeding started again and my doctor changed the Vylibra to what I'm on now. I was on the 2nd week of Vylibra when I started the new pill and bled from May 31- June 23. Currently I'm on the week without a pill but no bleeding is happening now. Should I not expect any bleeding "period" until the end of July?

Also I've had blood work and 2 ultrasounds done, not pregnant and no PCOS. I was told that if the bleeding continues or doesn't come back I'll have to get a uterus biopsy done. Why? Idk.

What do you guys think it could be or could help?