I've got a white bump on my tongue its been there for a few months. Anyone know what is might be?

Bump on tongue. Impossible to answer without complete history/exam. For any lesion you need to see someone... Oral surgeon/dentist/oral med. Most of time it is benign but tongur is common place for bad lesions. While it sounds like a fibroma.... A careful exam and probably a biopsy should be done.