For 2 wks ive been exhausted, thristy, bad headaches and when i work out i get dizzy, short of breath, cold sweats and almost pass out.

Doesn't sound good: If I were trying to explain all those symptoms with a single diagnosis, I'd say you're anemic. It may be more complicated. You need some tests to figure just what's going on. New onset, uncontrolled diabetes could also do that. Some infections could as well. If a picture's worth a thousand words, imagine how much more information could be obtained by just examining you. Pls be checked.