I am 16 years old, periods very messed up .. Scared for my future?

I was put on the pill when I was 11 til I was 13. Then when I was 13 I was put on the hormonal implant, had that in for a year then put on the pill again. I stopped taking the pill because I was still bleeding everyday , having bad pains etc. I stopped the pill just before my 16th birthday which was 6months ago , I was bleeding constantly for 5 months and then the doctor put me on a pill called " Utovlan" to stop the bleeding when that stopped I bleed for 6 days really heavy and haven't been on my period for a month. I'm confused, scared that this can affect my fertility in the future. The doctor just keeps putting me on birth control which isn't helping I want regular normal periods