I have a small tiny bump near the floor of my mouth, I can't see it but I can feel it with my tongue. Its sort of hard but moveable. It feels sort of like when you have a pimple on your face and the center of it is hard.
The Bump is located right infront of the tongue, right in the center of the mouth below the teeth. It's basically infront of where the frenulum would end, at the position where the floor meets the part right below the gums

Hello Brokenbeat, Welcome to the site. As I have said earlier to 'taz' I can't comment on your fears except to say you must get the lump seen by a dentist or doctor, otherwise your imagination will just run riot and you end up with sleepless nights! Let us know how you get on. Regards Brenda.

I have the exact same thing and I'm freaking out. I noticed it a week or so ago and it's driving me crazy. Did you ever figure out what it was?