I have a small white bump under my tongue and it hurts to move or stretch the tongue out. i'm not super worried but is it something worse than i think?

Canker sore: also called aphthous ulcer is the most common oral lesion. Individual ulcers typically last 1-2 weeks. The condition is idiopathic (cause is not known) recurrent aphthous ulcers is usually self-limiting. Try to keep adequate oral hygiene as possible. If concerned, see your dentist for consultation.

Bump under tongue: This cannot be diagnosed without a visual exam. Any swelling, sore or lesion in your mouth that does not heal in 7-10 days should be examined by a dentist or an oral surgeon.

See a dentist or: see your MD asap. This is not normal and should be properly diagnosed.

White lesions: Sorry, can't possibly diagnose over the computer. All white lesions should be evaluated by your Dentist, especially if lesion has been present longer than 10-14 days. Great majority are perfectly benign. But very small percentage require additional and immediate treatment. For your own peace of mind, stick your tongue out at your Dentist.