I was on gonal-f too, short protocol.
1st time - started on 75 (had very high AMH), which was increased regularly as I wasn't responding to the low dose. Had e.c. around day 14ish (can't really remember). 7 eggs collected.
2nd time - 150 the whole way through. Didn't get monitored over the bank holiday and follicles raced ahead. Had e.c.on about day 11. 10 eggs collected.
3rd time - 150, had one day where they dropped it down a notch, then returned it to 150. Again the weekend got in the way and I think they did e.c. a day late really at day 14 - the leading follicle reached about 26 mm by then! 6 eggs collected (despite 17 follicles showing). Got late-onset OHSS.