Definitely tell your doctor about waking up gasping for air. Also, if you get sleepy a lot throughout the day, or have to nap, he should know. Long term, it is very unhealthy, and can lead to other issues.
I got to where I couldn't drive more than 20 minutes before I would get REALLY sleepy. I actually almost fell asleep at the wheel several times, and realized that something was REALLY wrong.
I would also jerk a lot in my sleep, and I was told I would yell out during my sleep "HELP, HELP!" (freaked my son out when I visited.)
I think my brain was doing it's best to restart my breathing when I stopped for too long.
If you do have sleep apnea, getting it treated will make a HUGE difference in how you feel.
Best of luck!
AKJ