dizzy, heart racing, weakness, blurred vision, can't focus.

For about a year and a half now I have been experiencing random and sometimes daily episodes of dizziness along with pressure in head, blurry vision, and I get hot, shaky and weak. But I am not anxious or worried about anything. It has been getting worse and just the other day I almost fainted and was wheeled to the nurse. My blood work was done and everything came back normal except for my heart rate. it was 116 and blood pressure was elevated during episode. I am 23 and do not have medical insurance and I have been to the doctor once before but nothing was done, just suggested that I change my diet and  this last time they suggested that I was dehydrated but I have been making sure I drink at least 64 ounces of water a day and my diet has been healthy lately but the episodes are still getting worse.

I am just confused and don't want to waste my money on doctors that give me the run around or suggest things that I know are not apart of the issue because I do not have insurance.

any help or suggestions would be greatly appreciated.