What's wrong with me?  Allergies?  Viruses? Each summer, for a month or so, I go through this phase where I have a runny nose, itchy eyes, and excessive sneezing.  I think it has to do with allergies (e.g. hayfever or whatever it is called).  Usually it goes away without medication.  However, it's very annoying 'cause I can't sleep and work well.  I've taken Claritin (about two times the recommended dose because it didn't really work after an hour).

Because it hasn't worked yet, I'm not sure it is related to allergies.  WHAT IS IT, AND WHAT SHOULD I DO?  Please help me if you know anything about this (Don't answer unless you really know something about it and use proper grammar/spelling).  If you're doing something related to this in university or you are a doctor, that would be a plus.

Summarized question: Are runny nose, itchy eyes, and excessive sneezing a symptom of allergies or viruses, and what are the treatments for it?