It is difficult to say if your mood swings and sleep habit changes have anything to do with the lesion in your brain (also, you did not mention what your doctors believe this mass to be). Unfortunately, you are also at an age where mood swings and changes in sleep patterns are very common.
If you are concerned, and especially if it has been 6 months or more since your last MRI, then you might ask your doctor to order another MRI to give you (and your doctor) some peace of mind, and to ensure the stability of this lesion in your brain.
Sincerely/ Robert A. Wascher, MD, FACS
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