Am I Just Being Paranoid or Could I have Swine Flu?

My boss just got back from Cancun and was complaining of a stomach ache and some congestion but he felt better after like a day on the couch. I woke up this morning extremely congested, sore throat, really tired feeling and somewhat nauseas. Is it possible that he could carry the virus but only have a mild case that affected me worse? I'm not really that scared if I do have it, I just want to stay away from others so as not to spread anything if I do.