I had sex on the 8th and 9th of February which are not my ovulation days according to this app, my period normally comes on the 15th .... last month we had sex on 8th of January my period was a day late it came on the 16th , my period was 2 days late this month arriving on the 17th It came very light ... how ever I felt pregnant and never had problems with my period ... so I took pregnancy tests and they were negative so I then took ovulation test which were positive ..... on the 15th and 16th .... is there a chance I maybe pregnant?