What are little white round balls on my tongue? What are they? They're all over and hurt!

Can be thrush? Unless a doctor sees these white bumps, it is difficult to guess. It could very well be thrush or bad oral hygiene.
Hypertrophic papilla. White bumps on the tongue may be hypertrophic papillae or taste buds. These can become enlarged and inflamed for many reasons. If they last more than a week you should see a doctor to try to find the cause.