Hi Shane, have you tried physical exercises and meditation? The reason I say this is because, due to extreme stress, I had nerve compression, and possibly vascular compression, that I was able to alleviate with exercises ... ...
This kind of thing. This affect my sinuses (lots of popping) and blood flow to my head/brain. I don't think mine was a bad case, and I guess this kind of thing is really quite common.
Also, as for meditation. I reckon we could all be tuned into loads of things at once, and I'm not saying that what you are suffering is a focus issue (not at all), but just that there could possibly be a way for you to focus in and out of different things possibly, by exercising focus, maybe