Hi. I have 29 days cycle and yesterday was 13th day and i took ovulation test at 1030 hours and it came positive and than at night around 2100 hrs i got abdominal pain on my left side( It was just like ovulation pain). Today morning i again took opk test at same time and than in afternoon at 1600 hrs and both came negative. Ovulation is possible on 13th day and i really ovulated? What are the chances?