Nasal drainage...!!??

I am a healthy 27 year old woman. I was a bit sick about 3 weeks ago but since feel great. Although on my right side of my nose I am constantly having to blow it. About every 45 minutes. When I do it is A LOT that comes out. Always clear and almost slimy. Do I have a sinus infection, allergies? Other than that I feel great. It is annoying and I hate taking medicines. I want to know what is wrong before I go buy something over the counter. I refuse to go to the doctor about this also.