So I sometimes get really lightheaded while standing up. I always thought it was normal ; but sometimes it's really bad. I will occasionally lose my vision, convulse (sometimes sit down /fallen a few times), i have had a strange metal taste in my mouth afterward a few times and today my whole upper body became warm and fuzzy. It seems to have become worse as I have gotten older; thiugh I am fairly young. I am 23 years old. Should I be worried? I don't have insurance nor do I have much money so if it's normal I would rather not go to a doctor.