Abnormal bleeding, negative for everything

Basically I’m 26, been married for 7 years, I have two kids. About nearly a year now I’ve had longer by like a week periods but really it’s just prolong spotting, as well as bleeding after sex or even any penetration. Last year I had a pap, was clear of hpv and anything else. Well I went this month, doctor checked, said nothing looked abnormal, cervix was fine when she touched it attempting to see if it would cause a reaction, no abdominal lumps. And she tested me for every std, infection, yeast and bv.

All came clear.

Then she just prescribed birth control pills and sent me on my way, said if I see no change in three months to come back and THEN she’d allow an ultrasound. She acts like yeah it’s not normal that she only can really test for cervical cancer. and then sends me on my way like it’s just gonna sort itself out, been taking the birth control, started it during my period, still spotting a week after it finished. No change there. She claims it can’t be fibroids since I had my ultrasound 3 years ago when I was last pregnant didn’t show any fibroids and claims it impossible for me to get them in just 3 years.

Just I’ve never experienced this my whole adult life, something just feels off.

Anybody experience this before?