I'm 38, very regular cycles, 29 days for 3 months, then one 33 day cycle...over and over, that's my routine. Had sex twice during ovulation time. Am currently on day 37, no period, I've been achy and crampy for two weeks now, the last two days my breasts are SUPER tender- but testing a BFN. Even had a blood test on Friday (so day 34) and it was negative. What's going on body?! Bleed or be pregnant, don't mess with me!