I'm sorry I know how that sucks. I usually never cramped on clomid until this past month. But since you're taking injectables it could be from the combination.
my pain has been for a couple of weeks now. but i just got my AF. so . not very happy
I had lots of sharp pains last month after taking clomid and ended up with a BFP.
How long did your pain last?
It sounds like a combination of all of the above. Typically gas causes sharp pains. Try boiling some gingerale (stir out most of the bubbles) and then drinking it like a hot tea. That helps the gas (and the pain) I believe I was told I could take Gas X too.