end of my rope

I am at the end of my rope with feeling dizzy, lightheaded, feeling my heart race, feeling short of breath, feeling as if I'm gonna pass out...feeling tired, wondering if I have the strength to make it through a seemingly simple school day. Tired of feeling weak. Mostly, I'm sick of feeling like this and not knowing what is wrong, what these symptoms could be. I'm tired of having to keep going when I feel like this. Say a little prayer for me, would you?