Im 17 years old, I use to have the implant i had the implant for about a year until i got it taken out, when it was taken out i got the pill injection at the same time, ive had the injection twice now. When i got the implant put in it stopped my periods, i didnt come on for about a year. About 3 days ago i came on with heavy bleeding and sharp cramps in my belly, is this normal or have i had a miscarridge and need to see my doctor?