Ovulating timing question
ok so I’ve been doing 2.5mg letrozole for “unexplained irregular menstration” (not PCOS), and my ovulation tests have been showing an increase leading up to ovulation. like they’ll be light light light slightly darker slightly darker dark. so I had a few days notice leading up to ovulation. and I was able to get pregnant but unfortunately had a miscarriage last cucle so this month I took 5mg letrozole instead.
I was ovulating cycle day 21 on 2.5mg and so wasn’t expecting to ovulate so soon this cycle. got a positive test yesterday cycle day 14, but with no warning (test the day before was completely negative, very light line). I’m really worried about having missed the window this time since before I generally knew to have sex in the two days leading up to positive ovulation test. I was also only testing once every 24 hours so im worried the test could have been positive even earlier in the day and I might have missed even more crucial hours.
today I have very stretchy cervical mucus (yesterday didn’t have any that I noticed) and slight cramping. i did have sex last night around 11pm, test was positive around 4pm yesterday. I always assumed the egg was viable 12-24 hours but several medical sites told me today that the egg has the highest chance of being fertilized within 4 hours of release?!
HOW do I know how to aim for 4 hours from release? every step of this process feels like it has an accuracy rate of “plus or minus about 12 hours” so if multiple steps are off by 12 hours from what I think, I am just afraid I’ve totally missed the window and need to be far more accurate apparently on 5mg vs 2.5mg of letrozole. the higher dose also gave me HORRIBLE migraines for over a week so I’m dreading having to take it again.
are there ways to more accurately predict EXACTLY when egg is released (or at least closer than “12-36 hours”)? should I be testing multiple times a day? does the cervical mucus changing help narrow that window down? help!