What Causes Dizziness And Excess Sweating?

this morning when i got up i was a little light headed. thru out the morning getting ready for work I was sweating alot. usually if I am rushing I sweat. once I left for work I was sweating no more. but still feel a little quizy and dizzy when I look up. I am 67 yrs old I take medication for various things. thyroid, blood pressure. collestrol