Hi Ive Been Thinking Of Seein My Dr For Being

Hi Ive been thinking of seein my dr for being stuffed up at night. If I stand up it will go away. It only happenes at night so sleeping is hard to get a good nights sleep. During the day especially in the winter my nose runs. This has been going on for a few years. I have also started taking an over the counter medication but it is getting old to have to keep taking it. what could be some reasons for this?