I use clearblue digital advanced ovulation tests. On cycle days 7 and 8 I received high fertility. On day 9-10 it said I was at my peak fertility. I have a 28 day cycle and it has shown positive ovulation more than once before so I have kept testing. Day days 11-12 low fertility then on days 13-14 I received a high fertility and today on day 15 I got another peak. From most of what I've read I know it's not possible to ovulate twice. I feel like this time may be the actual time since I can feel a slight cramp in my ovary. Has this happened to anyone else?