Can I still drive a non-commercial vehicle on a CDL with an expired medical certificate?

A couple of months ago, I went in for a CDL physical, and while in the process, the physician who examined me suspected I was at risk for sleep apnea because of my weight (I'm about 100 pounds over). So he only renewed my medical certificate for three months and told me I needed to have a sleep study done. Well, I was swamped with work and I couldn't get an appointment for a consultation with a sleep specialist until a month and a half later, and then the specialist scheduled me for the actual study for two months down the road, and on top of that, if its determined I need to use a CPAP machine, I would need to be on that for another month and then go in for a second study before being given a clean bill of health. So that puts me at around the end of February next year before the physician who examined me can legally renew my certificate again. Problem is my certificate expires at the end of this month and so I won't be able to operate a commercial motor vehicle legally for a while, but does this mean I can't even drive my own car or any other non-CMV? If so, then I'll need to take some kind of action because my livelihood depends on it.