Hi
Welcome to the MedHelp forum!
In all likelihood bitter taste is the side effect of the chemo medications. Since you have stopped them now, the taste will go too. OK here are a few tips for you. Try them. They should help. Have citrus juices, lemonade and foods marinated in vinegar. They help in washing away the bitter taste by producing more saliva. Brush your teeth and your tongue with a tongue cleaner at least twice in a day and surely at bedtime. It will help in lessening the bitter taste. Vit C tablets, over the counter oral mouthwashes will help fight the taste. Increase fibers in the diet. Eat fresh things like apples that are crunchy or rough things like popcorn scrapes the white debris off the tongue.
Talk to your treating doctor regarding this. Take care!
Talk to your doctor, i am sure its from the medications, this is a side effect. Good luck!