Need input - follicle size at trigger

Melissa • Pregnant with Baby #1 as a solo Mom by Choice! TTC for 3+ years when married and over a year of fertility treatments. Took a break for a few years after divorce. Began preparing for being a solo mom 2 years ago with surgeries and going on supplements to i
My doctor is having me trigger tonight; follicles are 16, 16.5, and 17.5. Originally they were going to have me do one more gonal-f shot tonight and trigger tomorrow, but my estrogen levelcame back at 630 so they decided to trigger tonight. Does this seem too small? Has anyone triggered with follicles this size and been successful? Mine have always been over 20 at trigger and the doctor originally told me they trigger at 18. Any input or personal experience is welcome!