So around a month ago I felt like a little raised bump at the fleshy bit just behind my bottom teeth and thought nothing of it really. But I began to play with it,poking it with my tongue and pressing on it with my finger and it got much bigger. So over the month I've left it alone and sometimes forget about it and it went right done and basically disappeared but when I begin to feel for it again and poke and prod,it comes back and gets bigger!!! I'm only 14 and it's petrifying me in case it's mouth cancer and I can tell my parents are completely fed up of me moaning about my health and even though they'll take me to the doctors,it always ends up being nothing! Does anyone have any suggestions on what it could be? I'm trying my hardest to not touch it but it's not working and the thought of having to go through this worrying process again and having to go to doctors/dentists is just draining me. I am grateful for any help that is offered.