... month bleed' about 4 months ago and haven't had a period since. Since having the implant in I haven't used it as a contraception until a month ago and I've been having constant sex since, and all of a sudden I've got a really heavy period. It started out as just browny discharge and now it's a proper bleed. Has this happened to anyone? If so will it last long? And does it mean a possibility of pregnancy?