Your brain is normal from the MRI's perspective. That means no major or serious issues. But, a standard MRI looks at 10,000 neurons (about 1 cubic millimeter) as if they are one. It averages the image of those 10,000 that it sees over the space of a full second to come up with a computer generated image of averages.

It is good news but does not over-rule the symptoms you are experiencing. They are real.

A DTI MRI would show evidence of a struggling brain by seeing pathways of waste that are fuller than normal. Sort of like seeing an oil stain on the driveway. It tells you there is a problem. It just does not tell you what that problem is. An fMRI would show areas of over-use and under-use meaning the brain is out of balance in its function. A high Tesla (6 or 7 T or higher) MRI would possibly show evidence of fine damage but not life threatening damage.