The <a href="">glow app</a> has been spot on for my periods for 2 months, but this month I'm a week late according to glow. I am "trying" to conceive and we did have unprotected sex during my fertile time last month. I tested Friday (one day past my start date) and it was negative. It's now the next Wednesday and I still haven't started. Is it too early to test again? Opinions please!