During my workout this morning, I got a terrible side-ache. Usually i can walk it off (I was jogging), but today I had to practically stop moving for a few minutes before it went away. It was early morning and I only had a handful of cheerios prior to exercising. Is there any easy way to get rid of these? It doesn't happen very often, but it is frustrating when you want to continue but can't. Any pointers for next time?