Chillax Jade....the doctors will give you some concrete info very soon. Don't jump to another health issue before you ride this one out.

Do you brush your tongue? Many people don't and many people should. We use various types of scrapers and brushes this side of the pond. It is common to have white residue on your tongue and it could be worse with salty or acidic foods.

There are a million possibilities of what you are dealing with and only maybe one for sure. Work the doctors to find the one thing to worry about. Fear and stress will throw the body and immune system into confusion and bad things can come from that.

Rest up and push forward for the biopsy and see where you are then.