Fusiongirl there are quite a few medications that can cause trembling, shakes, quivers, or just plain jittery feeling. Some of the bronchial meds will do that in some people. But just to be on the safe side, I think you should call your doctor and tell them about it, and see what they recommend. It would be the safest and most prudent thing to do. You know the saying "better safe than sorry!"
Good Luck to you! and let us know what you find out.