I am not a mom of twins and have only had 1 baby but I had kind of a strange symptom before I knew of my pregnancy. I had major gas pains in my stomach, real bad ones like someone was sticking a needle straight through my belly button. Simethicone tablets helped at first but then they got worse and worse til I could not stand up straight. I don't know if this will help you, you did not state your problem but I wanted to add just in case.
at 11:43 PM on Nov. 10, 2009