Trouble Swallowing

Around seven months ago I was eating and watching tv. I turned my head to look at the screen and went back to eating but found that I suddenly couldnt swallow. The weird thing is that I didnt feel anything hurting me in my neck. It was as if I did not know how to swallow, the food just stayed in my mouth. Because it was so long ago I cant remember exactly but the next day I remember I almost choked on rice. After a week it got a little better. I found that I could not swallow without water. I could but the food that I was eating would have to be moist. Eight weeks after this started I could swallow liquids fine unless they were thick. I could eventually swallow solids if I kept them in my mouth long enough and I assume that the food got wetter with saliva. But because it took a very long time for me to swallow without water, I just started to swallow with water with everything i eat. Froom the eight weeks after till now it has not gotten better. I have had a scope shoved up my nose into my throuat and a swallow test in which I had to have a cup of water to swallow the cookie and maaake the pudding thinner. Both tests say that I am healthy and one of the doctors thinks that this was a gradual change. IT WAS NOT, I was fine one moment, turned my to the side and back, then I couldnt swallow. I have looked on the internet for people with this problem but most people differ from me in the way that they sometimes choke. I dont choke but I swallow with water and it feels as if i dont get the feeling to swallow if I dont have water. One of the worst things is that I am 16.  I really bums me out whenever I think of this and how long it might last. I know this is kinda a long post but if anyone has any information on what is happening to me, I truly appreciate it. Please ask questions if it can help you figure out what is wrong.