Allergies?

Do you think it's possible to have allergies even though you never had them before? Well, you see, I think I might have them but I'm not sure. Every morning, for like a week, I've been waking up with my eyes swollen and watery, and my nose is clogged, runny, or what ever it is.So I looked up on Google to see what was wrong but what came up was allergy medicine and what to do to prevent it if you don't have allergies. So I read it, it said it might be from not enough water, or not enough head elevation when you sleep, or allergies. So I did what it so to do, and there was more but I can't remember, but it still didn't work. So I'm not sure. If someone knows tell me. Please. :)