On 8/13/16 my Nexplanon (implant birth control) expired. That same night I had unprotected sex and my partner did not use the normal withdrawal method as he usually does. Now I have a usual 28-30 day cycle. The first day of my last period was 7/31/16.  My period is scheduled to come within the 8/28-8/31 time frame. I now am two days before the earliest expected time. Last week I had weird abdominal fluttering sensations. Not like cramps but similar. They have went away now. Yesterday I went to the Gyno, and she swabbed my cervix and found a brownish red discharge. I found it a little in my underwear prior to the appointment. I have taken a test on 8/25 and it came back negative, however it was a cheap one and not sure of the HCG levels it could pick up. If anyone has any advice or opinion for me that would be much appreciated!