I am sick, Anything I can do/eat to get better?!

Hello :) I am sick, and I have been sick since saturday, and I am on february vacation, and I want to get better maybe faster if I can. I have asthma too if that helps. my mom has given me some medicine, and it works, but then it kind of stops working after so much time. So basically is there anything I can eat or drink to help me get better? Or do? It seems weird, but every time I lay down i am not tired( even though I am ) But every time I get up to walk around, I get tired, and Obv. you can't sleep walking around, so I can't really sleep.lol Plus, I don't like to sit still. By the way, I am 13. Have a great day, and thanks for the help :D