whenever I hear words like faint, dizzy and/or shaky... I think of my low blood sugar reactions (hypoglycemia) when I do get them, as a Diabetic. I don't think you could be going through anything as severe if you've always had a clean bill of health, and/or don't have any history of Diabetes in your family, but hey...all that expended energy would be sure to send your blood sugar for some kind of loop, making you light headed etc......but also during these reactions,most Diabetics/hypoglycemics, get EXTREMELY hungry.....but good sex always makes me hungry too...so ah..oh well, I just wanted to put in my opinion.....I hope you feel better, and get it all straightened out, sounds like you've been having a lot of fun!

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Xs and Os,
Kristin