Blood clots?

L+E

Does anyone experience blood clots with PCOS. Sometimes I pass 3-4 in one day (nickel size) and sometimes it’s only once a week. I am irregular prolonged period, no pattern. Is there anything to help? I’m waiting for another transvaginal ultrasound but I keep having to reschedule because I end up bleeding heavy. I already had blood work done, vitamin d is low and thyroid is slightly elevated. I already took medication to stop my flow last month due same issue and it’s not recommended to take again.. any help or advice?