Yesterday, sick

OK yesterday I was going to start week 3 of P90X, didnt happen. I was feeling like I icky, come to find out I was dehydrated...dizzy, light head, eyes were focusing after it got to its spot(those being the worst), didnt feel hungry, wanting to throw up...get the picture. My body felt like it had did a workout for hours, arms & legs very weak, didnt want to stand-up, arms I just wanted them to hand to the side and not be used. I even took a shower late in the evening and my arms were struggling to wash. So, yesterday I need to take a day off. Hopefully today I keep hydrated and workout tonight.