i am 21, i started my period at 11 and was normal until i was 14 then they became very irregular, i was put on the pill but that made very little difference apart from when i did have 1 it was very heavy. i then came off it and they stayed irregular it gradually got worse and i would go for 6 or 7 months at a time without a period. i then had a contraceptive implant put in and since then i have not stopped bleeding this was 8 months ago now, the Dr did tests but cant find anything wrong any ideas as to what mite be the problem??