Why am I feeling this way? What should I do?

I'm 19 years old.I am currently experiencing nausea, feeling shaky, and a sore throat. This is what I had to eat today. Breakfast- 1 Bacon, egg, and cheese burrito with 1 Yoplait raspberry yogurt with 1 glass of orange juice.

Lunch- 1 grilled cheese with 1 pita bread with 1 Campbell's tomato soup with 1 Hawaiin Punch Lemon Berry Squeeze juice.

Dinner- 2 Little Ceaser's cheese pizza with 1 sweet tea. I went to school and spent the remaining of the day with my boyfriend. Why am I feeling this way? What should I do? I tried to sleep on my back and side, but it isn't working.Why am I feeling this way? What should I do?
Maybe lack of water. That happened to me once.

I fainted.



It turns out that my (something that is too long to spell) system stopped working because I had no water in my system.



Drink water as much as you can.