Sorry, mama's don't mean to thread-crash, here, but I have conceived w and w/o Clomid and while at and above and even below target weight... so I hope what I have to offer could help:
CrimsonTide: (and everyone ttc!) I highly highly recommend the book, Taking Charge of Your Fertility
by Toni Weschler. You said something about waiting for a positive OPK to dtd-- this is almost always TOO LATE! Most women get preg from bd days before O! Timing is everything! As soon as you have wet CM (even before EW, but wetter than creamy) you should dtd every other day until your temp shift c: blessings and I will think bfp thoughts for all of you
I am saying this in the most loving and supportive way possible bc I have btdt on ttc while overweight: I was always told that O often returns without drugs and that drugs like clomid work better (or at lower doses, thus less side effects) if I would drop even as little as 5-10# (I was around 80# over my goal) and keep it off , or keep losing slowly (not too quickly, as that can be detrimental to ttc) and I would get SO offended, so hurt. I thought the dr was trying to guilt me into meeting weight goals before they would help me! Then, I gave up ttc and just thru other lifestyle changes (not really trying to lose weight) I did lose a few # and did conceive w/o drugs. So, the dr had a point, and it did happen for me just as they said-- they were not trying to be ugly about my weight.
Side effects on clomid-- I was mood-swinging pretty high and low! I felt scared and threatened about my health for no good reason! I even thought I was having an allergic reaction to the clomid! Ach! (in my defense, I am allergic to most of the rx I have ever had, LOL)
Hoping for babies soon for you, mamas!