27mm follicle after Femara

Megan • Married to my amazing DH! 2 DD 01/01/07 and 10/11/17 and expecting our 3rd 08/17/20!!

Took 7.5 mg of Femara CD1-7 and got a positive OPK on CD14 and triggered CD15 after ultrasound confirmed I hadn’t yet ovulated, but I only had one 27mm follicle. I trust my dr 100% and don’t think she would’ve had me trigger if it wasn’t a potentially viable egg. But is 27mm too mature?