well I am 18 I have alway having headaches the start of in the front and then travel to the side after a while some are worse then other as well as i can up 15 or more in one day. If was just a headache I would not be worried but i have nausea with all to most headaches...as well as being light headed and dizzy. I had headaches since i was 10 but when i was 13 it happen twice where my vision went black and i was not able to hear anything i didn't think anything of it because it stop. About 6 months ago my headaches started getting worse almost everyday thing and i would get light head and dizzy and my vision would go black and i couldn't hear it was only a few seconds so i thought nothing of it. Honestly nothing of this nature alarmed me until i was in the shower and my body felt weird, not normal and my head started pounding,heart stated pounding, head spinning,vision gone,hearing was not gone i could hear my heart and i was scared but my family said it was nothing maybe i need new glasses or drink more water...so i got new glasses and i drink plenty of water and i forgot about it once again until today where is started feeling weird almost how i felt in the shower just not close as bad...i mean between today and yesterday my vision went black about 4-5 times and over all i felt lightheaded almost all day.I had headaches for the past four days i believe. Another about today is how weak i felt.So should i be concerned or listen to my family whom say it is nothing?