Why do I always feel so tired?

[Peridot]

I constantly feel tired throughout the day even though I get 8 hours sleep at night. I often feel as if I'm going to faint or fall alseep during the day and often when I stand up I lose my balance. What's going on? I've tried to get to the doctor's but they don't have appointments for quite a while

 

[Bettyexe]

oh my god, im the same!! what is it? i know im not helping im just glad someone else is the same xxx

 

[gavhouse_09]

the thing were you stand up could be high blood pressure and id go to the doctors about feeling tired all the time