I had implanon in for about 6 months (with no bleeding also) but had it taken out a couple of weeks ago because the acne was annoying. The very next day, I was lying in bed when I suddenly got this incredible pain in my lower abdomen.. i was doubled over and crying, my fiance took me to the hospital it was so bad. after investigating, I had a cyst in my right ovary which had burst (hence the pain). And doctors suspect Implanon was the cause of all that, the hormone prevents the follicle from breaking down in your ovary, and instead it forms a cyst. When the implanon was removed, the sudden drop in hormone caused it to burst. Now, about 2 weeks later, I've been having minor, (period-like) pain every night. I wouldn't recommend implanon to ANYBODY, nor would i ever try it again. It's just so not worth it.