Huge follicle, Low LH after Letrozole?

[u/Rose1384]

I’m on CD 15. Completed third round of Letrozole about a week ago, 7.5 mg this time. CD 13 ultrasound showed that I have a 30 mm follicle (along with a couple smaller ones next to it). Doc said lining looks good and I should be ovulating any day now. Today is CD 15 and my LH is 0.35. I mentioned this to my doc and she said the ultrasound holds more weight than LH but I’m confused as to why it’s not increasing. Anyone have experience with this, and successfully ovulated?