I ended up triggering 5 days later on day 11 and ended up with 5 follicles. I tend to surge early even naturally given my naturally short cycle since even being younger - so I surge by day 11 at the latest most cycles. Not sure what your FP is typically but if you are at 11mm today I would think you could trigger as early as Saturday but more likely Sunday. Also, did you do any estrogen priming or any suppression before stims? Suppression could be causing some delayed response. Look back to your other cycles and where you were at day 9. If the protocol has not changed but you are responding slower, I may take that to mean you might get only a couple follicles. Again, no harm in riding it out a couple of day and next u/s just to see where you end up.