Heart Problems and DOT regs question

I'm trying to find some legal advice from someone that also may know DOT regs and such. I am a 51 yr. old male, I've been driving since 1986. I've had 3 heart attacks, I have arteculorosis, (clogged arteries) I had quad bypass in 2006, my first myo cardial infarction was in Oct. 2001. In other words, a history of heart problems. About 6 months ago I went back to work for an otr company I had been with for approx. 6 years off and on, he knew of my heart problems, I'd had 2 attacks while working for him. About 5 weeks ago I began having problems again, serious ones. Arhrythmias, and near-syncopse, while on the road, and behind the wheel. 2 weeks ago I picked up a load, one of them CH Robinson loads, load all day drive all night. It finally got bad enough I went to the E.R. the next morning when I got in, after telling my boss what was going on, and letting him know I had just about passed out behind the wheel. Spent all and night in the hospital, for observation, had a few arhytmias while there but, was told to get to a cardio Dr. asap. by the MD. And don't be driving in the mean time. I report back to work, boss says go clean out your truck, we're a trucking co. if you can't drive theres nothing I can do for you, maybe in the spring you can drive a local dump truck for me. I asked then so, whats my status, his reply was, I assume your quitting because you can't drive, I said, well I don't see it that way, I'm here, I can do minor mechanical work, sweep the floors, just whatever for now. He shrugged it off, said I needed to sign my health insurance papers, I told him I would after I cleaned out my truck. If I sign my health ins. papers now, and no longer have health insurance my chances of getting in to see a Cardiologist, are zilch to none. He wants to fire me fine, but at least I should be allowed unemployment. Him saying I was quitting, just shows me how greedy, and downright mean this whole trucking industry has become. I'm done with it, I have no desire to be behind the wheel and have a syncopse. Should I be allowed to collect disability? or at least unemplyment, until I do get to see a Cardio Dr.? Just by telling my boss, that I was having these spells, wasn't it his obligation to remove me from the truck imediately?