Letrozole + no ovulation? Please help

[pregnantplease2025]

So, I have a cycle every month with ovulation (according to LH strips+ BBT measured with Oura) happening day 20/21 of a 27/28 day cycle. I was told this might be a weak ovulation so I was advised to try Letrozole. I tried unmonitored 2.5mg this cycle, from days 3-7.

I started measuring LH with the strips from day 11, and got a LH surge early AM (like 4am) day 18, with temps rising Day 21, 22, 23. So I was thinking, ok cool, I ovulated day 19-20?

NOW, today is day 24 and I just got my period! I'm super confused. I've NEVER, in the 3 years that I've been tracking this monthly, had a cycle this short or a LP this short. So now I'm thinking maybe I didn't ovulate at all? But the LH Strip did show a surge, and the temp did rise, but IDK... Do I need a higher Letrozole dose? Or is letrozole not for me? I'm super upset and confused.

Does anyone have advice or insight? Please help if you know anything :(

Could the issue be a luteal phase issue? Rather than ovulation. If you’re ovulating normally on cycle day 20/21 and your period comes 6 days later, that’s considered quite short. It wouldn’t normally be enough time for the lining to thicken to support implantation. The luteal phase of your cycle is usually very consistent. So if you’re now ovulating earlier, it makes sense for your period to come earlier. My luteal phase is the same length of time every single cycle, even though I have irregular cycles so ovulation can be late. I will always get my period exactly 15 days later, no matter what day of my cycle I ovulate. I believe the average luteal phase is something like 10 - 16 days long.

I would perhaps discuss with whoever prescribed you the letrozole, how best to support your luteal phase, it could be something like low progesterone or a thyroid issue that needs looking into. If you’re already ovulating regularly, adding in letrozole may not be of any benefit.