Have you done any OE stim cycles? Lupron is no different than menopur or Gonal-f - same type deal. My issue with Lupron was that for the first 5 days I was on a high dose (20iu) and BCP's and I was in a horrible and depressed mood and really should have been shut off from society! I was like a really pissy Jim Carey/Liar Liar. A thought couldn't come into my head without me wanting to spit it out. Yikes! Not good for the work place.
After that initial 5 days, my dose was lowered to 10iu and I stopped the BCPs, it wasn't nearly as bad. The shot itself isn't that bad.
I think the 'really bad' one you are talking about is the PIO (progesterone in oil). I couldn't do that one. Had to settle for a much, much more expensive alternative (crinone). Don't worry about that one yet. Just do the next thing in front of you, which is the lupron shot tomorrow.