You're probably okay Apnea-wise. As long as you are getting a restful sleep and there are no points where you stop breathing for extended periods.
The prominent cause of Apnea is when a back-sleeper's muscles relax and the jaw follows gravity. Then, the soft tissues weighted by the jawbone closes the airway. CPAP inflates the airway, opening it so breathing doesn't stop and no O2 starvation occurs. (CPAP= Constant Positive Airway Pressure)
Of course, if the snoring is bad enough there could be other health repercussions due to injury by blunt force trauma from the missus.