My girlfriend got the implant just over a year ago and since having it she has pretty mkuch been on her period the whole time. But after about 11 months of being on the implant she was still having periods all the time. She took some medication called terbinafine which is for anitfungul infections. She was on this medication for two weeks and during this time her peroids stopped but at the same time we had sex. So i was worried her peroids stopped because she was pregant, but then she had her peroid about a week after they stopped but it only lasted a few days. It has now been about six weeks since she took the medication and she hasnt been on her peroid since. And a week ago she threw up in the middle of the night then a day later threw up in the eveing. She hasnt been sick again but says she feels sick and has headaches all the time. Im worried she is pregant, could the terbinafine medication made her implant inafective?? or is her illness just an illness?? and her peroids have just stopped naturally??? please help????