Hi, Just Wondering If You Could Help Me Been To

Hi, just wondering if you could help me been to my doctors a few times but there not picking up on anything, I have a hard lump behind my uvula, my throat feels like I always got something stuck in it, and my uvula feels like its moved and when I lay down it moves to the sides which ever way I'm laying and always feels like I'm gagging and heaving on my uvula