I had to stop myself at the gym

Last night I went to the gym with my youngest daughter. Right from the get go she made it clear that she only wanted to work out for a half an hour. A half an hour is better than no hour. So I agreed to do an interval work out on the elliptical trainer.
I get on the machine. Put in all of the information that I needed to input. Got on the machine and warmed up. I started to push it with intervals. Then it hit me square in the face. A killer killer headache. Seriously questioning a stroke or something. I got off the machine. thought maybe I should stroll on treadmill. No.. Not feeling it. I will do some free weights... No still not feeling good.
I changed my shoes and my short half an hour work out turned out to be a 15 minute work out. Please drive me home. I took an aspirin and layed on the couch for 30 minutes. Felt much better. I believe I was dehydrated and this headache was a result of it. It is ok to stop when you feel like doo doo. Listen to yourself and know that the machine will be there later.
Today is a new day and today I am drinking at least 64 ounces of water! Go Jeanne Go!