Ovulation change????

When I first started Glow it said I was ovulating from the 7th to the 12th of this month. now its saying I ovulated from the 3rd to the 9th of this month. AF isn't due until the 26th of this month according to the "7th through the 12th" and now it isn't due until the 22nd which is in 2 days. I BD'd before my ovulation and all during my ovulation time and ovulation day. I took a pregnancy test 2 days ago and it with negative. could I still be pregnant? and when should I take the test again? I'm so confused and upset right now!!