Don't worry. They have specific tests they have you do and things that test your memory and all. You want them to see what the real issues are, if you have them. I got it through mine for dementia and ended up having some brain damage they found out later. I don't do well verbally sometimes. Mentally I'm older than I should be, as far as dementia and memory issues go.
Eventual treatment of my thyroid helped me alot, I was worse, butI could n't get it diagnosed till I got my SSD and medicare. So, just because you don't do well on the exam isn't always permanent, but may get better when you can afford treatment and get free of a lot of stress and stay well.
Just try to relax before you go in there and be yourself. That's really all they want to see. There's no right and wrong. Like they can ask you to do math in your head. Mine had a series of tests, there was no way I could know if I passed. The letters to disability from family, friends and others who know you can help too.
Ills--Sjogrens-Lupus cond., AI polygland. dysfunction 2, hyper/hypopigment, scoliosis,kyphosis,stenosis, deg.,O.A.,spine surgeries, salivary/lymphectomies, NASH, COPD, RLS, UT/GI bleeds, hystero, brain/nerve damage,TB
Meds--INH,Plaquenil, Evoxac, Metformin, Synthroid, HCTZ, HRT and Lidocaine patchs, Voltaren gel, Klonopin, Vicodin, Restasis, Albuterol, steroids