I have. A cut on the tongue can be exquisitely painful I know, but should heal within a week, since the tongue (and mouth in general), has a huge blood supply.
Try not to irritate it further my touching or playing with it, and eat softer foods until it heals..
You might want to try warm water salt rinses three or four times a day.
8 oz. glass of water, one level teaspoon salt. Take a swig, and swoosh gently around in your mouth until water no longer feels warm. Repeat until you've gone through the entire glass of water. Very boring.(!) Very healing.
If you see no improvement in two weeks, see your doctor.