Cloud bursting is a phantom pregnancy, and some goats do it more than others. The goat will think she has kidded, it can go the normal length of pregnancy or longer, and she normally "bursst" and you will find a goat with a very wet back end one morning. You usually see her belly getting bigger and an udder does develop, though not always very much. They often do produce milk, but not as much as after a normal pregnancy. If she is from a heavy milking line you may get appreciable amounts of milk, but I have usually found it is not worth milking them after a few days.
But if her udder is still getting bigger and you are sure she is not in kid, then I would definitely see what's going on and take some milk (or whatever the liquid is inside) off her.
Also if you do not want her to be in milk - no concentrates is the answer.