I think your levels look okay, and don't worry too much about lowering your dose. I would take them adjusting your meds as a good sign that their paying attention to what your body is doing & setting up the perfect o!
As for o on injectibles, it really varies depending on how quick you grow your follies, plus lots of ladies use a trigger shot to help o.

on this cycle!
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Leah
Repronex injections 75iu, 2000 met
4/05-8/05 5 cycles --all

9 & 10/05 mental break & hsg
11/05 150 iu Repronex, 2000 met, IUI

12/05-1/06 break
2/06 start Follistim....finally a