I had horrendous periods from adolescence and went on the pill continuously (without taking breaks except maybe every 4-6 months) to get through university exams, continued like that most of the time until I was trying to conceive in my 30s. I repeatedly went to doctors and was not offered any help.
About two weeks of every month (when not on the pill) I was wiped out, suicidal, a wreck. I was on sickness benefits for "depression" for over ten years. (Again, little help from doctors, just SSRIs.)
Finally when post breastfeeding it all returned I went back, repeatedly, to my GP, I was referred to a gynaecologist and given hrt. I am pissed off that it was only taken seriously once I was half way through perimenopause.
The mirena coil plus Oestrogel has changed my life. I now feel like I did on the few days of the high of my cycle (confident, optimistic, relatively energetic, able to sleep more or less, happy about life) all the time.
Not saying teenagers should be given hrt...but I wish I'd been listened to many years earlier. I think it's got better now that more female doctors exist.
I was terrified of the mirena and have a phobia of things like injections plus vaginismus...but it's been brilliant. I was offered anaesthetic for the insertion, so that went fine. (Took valium too to make myself go.) I had some bloating, but it subsided. Periods stopped altogether!
I know it's different for everyone, but maybe worth a go.