Sore on my tounge and I can't even drink?

Not enough info. These symptoms are too vague to entertain a diagnosis. If they persist an exam by your physician would be required as the possible causes are varied with different treatment requirements.
See doctor. Sores may be something simple as aphthous ulcer, but serious disease such as squamous cell cancer also presents as a sore on the tongue. Recommend strongly you visit the ENT or oral surgeon immediately.