I started charting on day 13 of my cycle. My bbt was 98.3F and on day 14-15 it was 99.3F ive been having sex regularly and according to my apps within my ovulation week. Flo says I’m supposed to ovulate on the 10th my other app says the 13th but I’m wondering if I ovulated already know I started charting late into the cycle, but my cycle is very irregular I ovulate different times every time with my shortest cycle being 18days and my longest 41