I Have Dry Mouth From A New Medicines I Am

i have dry mouth from a new medicines i am on , so i skuck on sugar free gum and candy through out the day. i bought special alcohol free mouth wash,toothpaste and a soft tongue scapper. But lately my tongue has been sore and burning. It has a crack down the middle and brownish color mostly from down in the crack if i spread tongue open it looks like dirt. i have good hygiene. i floss etc... I want to see images of different kinds of tongue problems, i know what a healthy tongue looks like.