I started going to the gym a couple months ago, and everything has been going fine until the last two times I have gone. Both of these times, I have almost passed out. It starts with me feeling light headed, then I get dizzy, and then I start to hear ringing in my ears. So I sit down for a while and feel real nauseous and about five minutes later I will feel fine, but hands start to tingle for a minute or so. After it happened the first time, I made sure I ate something, and I drink gatorade while I work out. Whats weird is that I have been doing this same work out routine for months and only these past two times has this happened. The two times it has happened, I went earlier in the day then I normally do, so maybe that has something to do with it. Any thoughts?