I sometimes wake up and a soft lump seems to travel from the back of my throat to the middle of the roof of my mouth. i can feel it but it goes back?

It is probably uvula: It is probably the uvula that dangles from your palate off the reroof of your mouth. Sometimes it can get swollen or edematous and it feels strange when it touches the back of our tongue. Take a look in the mirror. If it appears large and swollen and is touching your tongue then you have your answer. Salt water gargles for several days can shrink it back down to outs normal size. If that does not work, then see your doctor.