I started using the clear blue advance ovulation tests.. I got a day with a blank O which I know mean negative... yesterday and this morning I got a blinking smiley face which means high fertility. When you get a solid smiley you are at peak...

Even though I tested this morning and got a blinking smiley I started to get super crampy so I decided to take another this evening. It's now a solid smiley... I had sex yesterday but today I'm not able... im scared I'm going to miss my window... would today and tomorrow be best or tomorrow and Saturday ?? I'm just confused bc it was blinking this morning and solid this evening...

Help?