Hey. I have a very similiar story, I havent had a period for like 3 years now. I am 21. I never really had a regular period. I stopped taking birth control before my period had ceased to come. And I have no clue whats goin on. Ive herd ppl say its a cyst and i have herd ppl say it was becuase i shot heroin for a long time. but idk. i wish i had insurance.
I had the implant taken out of my arm and I had normal periods then I just didnt have 1 for 3 months, it will go back to normal when u come off bc you produce new hormones and its just your body getting back to normal, dont worry about it it will come :)
Are you on birth control pills? When I was on birth control pills I seldom had a period. When I went off the pill they came back normal.