Hi Sheila:
Ok, using your average cycle of 50 days, then you should O between cd 34 and cd 38 (12/5-12/10)....
Using your shortest cycle of 41 days, you should O between cd 25 and 29 (11/26-11/30)....
Using your longest cycle of 58 days, you should O between cd 42 and cd 46 (12/13-12/17)....
So! If I were you, I'd start the "regular" BMS on 11/26 and I'd BMS at least every 3 days from 11/26 until 12/17 and I would step it up between 12/5 - 12/14 (maybe every 2 days and definitely any day that you saw ewcm or otherwise fertile cm .. and any day that you had cramping or twinges or spotting).
As for the soy, I think I have heard something about soy... I'll look into it. I know that people also take Vitex (Chasteberry) instead of Clomid. You might want to check over on the alternative treatment bb too.
Good luck and keep in touch

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Maura