What Do The Following MRI And EEG Reports Indicate?
I read your question carefully and I understand your concern.
However (fortunately) considering the fact that you had an MRI less than 3 months ago I would say the chances of the symptoms being due to a tumor are almost zero. While a tumor can in some occasions manifest with behavior changes, for a tumor to affect behavior and mood, it should reach a certain size, it doesn't manifest that way when it is of a microscopic size undetectable by the MRI, it would not cause any symptoms.
The fluctuating course goes against that as well, a tumor has a progressively increasing course.
I guess the MRI with contrast will give you some peace of mind, but in the meantime shouldn't worry much about that.
I remain at your disposal for other questions.