Lightheadedness: It sounds like lightheadedness or "presyncopal" episodes. In young women these are usually vasovagal reflexes, dehydration, or possibly related to your heartbeat. If it's a recurring or bothersome problem or if you ever faint, then go see PCP to examine you, check BP with tilt test, and get some baseline EKG and lab work.
Answered 3/3/2016
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