Good to see you, gr8fl Sorry about the cancer diagnosis.
There are supplements like Quercetin (plant derived and well studied) and Lion's Mane that can help with the immune system in general. I hope you have good vitamins as well. Nutrient rich food.
I got SSDI back in 2003 (2002?). Been a while! Do what these guys say. Have a lot of documentation from doctors (letter from doctor helps). You should go through on the first round too.
I wish you well. I hope you get SSDI right away!
Annie