Does anyone know why my cycle is so messed up?

F18 here. As the title suggests, I'm genuienly frustrated with my period cycle. It's been irregular for four years and it shows no way of gettinf better in the future. I had my first period at 12 and to my surprise it was regular from then up until 14. I figured that it was because Ive been struggling with depression (still am, just not as bad as back then) during that time and was under a lot of stress cuz school and stuff. But now after graduating? Nothing! Im not stressed, eat normally, exercise two to three times per week and am generally healthy. When I have my period, its agonzing asf. Heavy bleeding, painful cramps that not even ibuprofen 600 can numb, pass out occasionally and all that stuff. I also get hit with strong cramps at random days where I'm not on my period. If it helps, my whole family suffers from shitty periods. I dont know what my mother had, but her uterus had to be surgically removed a while ago. My gyno told me that this is normal :/ but made me take a hormone test just in case. The result was that my testosterone is just slightly higher than average but nothing worrying and since I have little to no PCOS symptoms, I doubt that that's the case. Fyi: I take meds for epilepsy but the side effects do not include shit like this. I dont care about fertility issues, its just inconvenient and annoying. Any help is appreciated! (Btw sorry for my english)