The implant has almost 100% success rate (99.9%). Getting no period at all or irregular periods
is a side effect of the implant. The efficiency of the implant is said to decrease during the third year in heavy women, so if you are overweight
, the device may have to be removed now and fresh one inserted to give you good protection. What you are experiencing looks like a menstrual cycle, so you need not worry. Consult your doctor for a review of the implant. Take care.