In all of the cases that I've seen it is usually subtractive, but most of the time it depends on how old the child is.
Yes it can our mood tries to recall events at a later date can affect our ability to access those memories
I'm sure the answer you are looking for is specific to your class, but I would say that the nurse should provide something like, "The tumor is most likely benign, but until we test further, we can't know if it's malignancy."
Ibuprofen should help and lots of water.
