Do I Have A Beer Allergy?

If I drink ANY kind of beer from Bud Light to Sam Adams and after drinking 1 or 2 beers I start to get very congested in my nose. I have at times (rarely) felt like I had trouble breathing because of this. I notice an excess of mucus in my mouth. I'm not a Liquor drinker so I don't know if that might have the same effect on me. Based on what I have said do you think this is an allergy specific to beer?