ETA: Since my blog is SO long, here's the Cliff's notes:
Original plan was injectables + IUI. E2 was rising way too fast. 626 on CD 6, 2245 on CD 9 (despite halving the dosage). U/S showed 3 lead + about 13 smaller follies... had to decide within 2 hours whether to cancel, chance it (trigger within 2 hours and hope the smallers didn't catch up), or convert. We decided to covert to IVF.