2wk long periods

So I typically have a normal 28 day full cycle. I stopped BF completely at 9 months. my period started at 11 months postpartum. since then I start spotting at day 28 (brown spotting) for a full week, then day 35 my official period 'starts' & that lasts a whole week with day like 2-5 being super heavy. I used to have random spotting whilst on birth control as well, Dr ruled out thyroid issues with blood work. I was thinking of switching drs. she's been my ob for 11.5 years. I've had all 6 of my kids with her, but she's veryyyyy old school. i think I have endometriosis or pcos, although I get pregnant easily without even trying so maybe I dont.... idk. I'm just tired of having a period for 2wks