Hi,
I have had a clear MRI, and two CT scans and none have shown anything. However my neurologist said that alot of injurys on the axon level are not picked up by MRI's.
I have heard of people getting PET scans, but for various reasons.

Have you done the neuro-psych test? I am getting mine done in June and have heard that this can at least set you up for results whether they be neurological or psychological.

I find it frustrating as well, having to wait it out,having some days harder than others and people not understanding.

I hope that things go well for you, but I would look into some other doctors. Sometimes all it takes is getting the right doctor that can understand and point you in the right direction.

Feel better.