I have these little white bumps under my tongue and it is a little painfull i was wondering if i caught something...?

Needs to be seen: Without actually being able to personally see what you descibe, we can't know what it is. I suggest that you see a dentist in order to know for sure what it is and what can be done to relieve the discomfort.

Possible: You may be getting some canker sores, or it could be something else you caught. Have your doctor or dentist take a look if things aren't clearing up in the next day or so.