Almost  everyday for as long as I can remember I have woken up with a stomach ache and feeling like I'm going to throw up

I am a 20 year old female, average healthy weight. I am NOT pregnant.Almost  everyday for as long as I can remember I have woken up with a stomach ache and feeling like I'm going to throw up. Most days I also wake up with a head ache. I can't shower in the morning because I'll faint. If I take a hot shower my heart races, I get light headed, EXTREMELY nauseous, hands start shaking, I start seeing black dots then I faint. So I take cold showers. This has been going on since I was little.But let's move on to when I'm on my period, because it's much worse. Last month I got my period on the 23rd, it ended the 28th or 29th. I started getting pre-cramps and mood swings around the 20th. I always get pre-cramps, sometimes mood swings. And the first 2 days of my period are complete hell. I cannot leave my bed, I can't move. I just lay there and cry, sleeping isn't an option, the pain is horrible. The mood swings are unbelievable. This month I started getting pre-cramps and mood swings on the 14th. It was really difficult for me to sleep the past few days because I can't lay on my back or stomach. Today is worse than the other couple of days, the nausea is so bad. My heart is racing and my hands feel like their shaking but they aren't. I can't imagine how sick I'm going to feel when I actually start bleeding. This curse is ruining my life! is there anything I can do? I don't know what it feels like to not feel like I'm going to throw up, I can't deal with this anymore. EDIT: I'm new, I don't know how to get this out of the "could I be pregnant" tag. I'm not f*****g pregnant. That's why I came to this site, because the only thing Google has to say is "you could be pregnant!" But I'm not.