From the middle of august 2016 to the start of February 2017 I didn't have a period at all. Like nothing happened. All pregnancy tests were coming out negative. I finally went to the doctor in January because I was sick of waiting to see if it would show up. I had the implant took out round about this time last year but I was regular every month up until august. I'm having fertility tests done and the doctor said it could be PCOS. I've looked it up on NHS website but I was wondering if I could get more info on it