State fair

So today we decided to take our 3 year old to the state fair; I stayed hydrated but couldn't keep off my feet much. By the time I really started hurting we had chosen to leave any ways so it didnt really matter by that point. Finally we get home and I swear I'm so nauseous that I feel like any minute now I'll be throwing up everything left in my stomach from today. But all I'm doing is coughing and shaking really bad. Haven't thrown up yet and at this point I'd rather myself throw up. Just don't know if I should be worried or just try to sleep it off.