mid cycle bleeding

22f

for a year and a half i’ve had mid cycle spotting/bleeding every single ovulation window, except for one. the flow and length of this varies with each cycle. this current cycle i dealt with some really really awful cramping which left my abdomen feeling completely raw the next day. this followed with a fairly heavy week of spotting/light bleeding; one day where my underwear was soaked with blood.

what is this??? just unfortunate to be one of the few who suffer from ovulation bleeding???? endo? pcos???

background info: had an external ultrasound last september which came back clear. periods are fairly regular (never miss one, but cycle length varies). period pain has gotten worse over the years, and outside of cd1 is very manageable. never been sexually active.