I just checked my notes from my 2 IVF cycles, and noticed that I didn't hit E2 numbers that high until 2-4 days later than you, but both times my follies were in the range you mentioned. The first time, my biggest was 13.5 and the second time the biggest was 11.
I had far more eggs in that second cycle too (20 vs 12 in the first), so it sounds to me like everything is progressing appropriately.
Based on your age, you can expect to stim a little longer than younger folks. It took me 13 days both times, but it was worth it. Slow and steady really does win this race. I know it's hard to wait things out, but it will be worth it once it's over.
Good luck to you!