I think they were concerned b/c of the jump in your E2 level, not the level itself but just guessing. There is a difference there with your follicle size so that is probably why they are waiting. My E2 level was over 3000 at trigger and I had 10 follicles measuring around 15-18mm at trigger, so packed in together size-wise. If your levels jump again, they will have you trigger, I would think but if you figure 200-300 per mature follicle, hopefully the majority of the 10 will be mature.