Before I started taking Alli I could go to the gym four times a week and do cardio for an hour, and do Funk Aerobics or do Water Aerobics. I could stop for a few weeks and restart without trouble. Now that I started taking Alli, I sometimes feel like I can't do anything at the gym. I feel very weak, alsmost as if I might faint at any moment. Do you think there's a connection between my limited energy and Alli? What do you think I should do?