Do i have swine flu? i'm scared!!?

ok, so all this swine flu, death talk, blah blah blah is starting to get to me. as far as i know, there are no cases of it where i live, but its close to us! 15 people in my homeroom went to mexico in the past 3 months. the most recent trip was 2 weeks ago! so, i always have a stomach ache. when i burp, i feel like throwing up. my nose is stuffed (but it usually is anyways), and i've been getting headaches at the exact same time each day. im not coughing though, and no one i know seems infected. im just SO worried! help!