Sleep Disorder is affecting my job

Hi, I'm new to this site. Found it on one of those nights at work when I'm searching for ways to treat my sleep disorder.

Here's my story. I'm an engineer working at night. I'm sleeping for some 12-14hrs just to make sure I get enough sleep during the day since I'm working on graveyard shift. With that much sleep, I'm assured that I'll be up and running for the whole night. Guess what. I was wrong. My co-workers kept telling me that I still have those snoring moments at work (quite embarrassing especially when the whole team is now working to wake me up every now and then). Thing is, I'm actually surprised that they tell me that I've been asleep for a long time already, 'cause it really felt like I was doing my task the whole time. According to my co-workers, I'll doze off suddenly then wake up then just continue my tasks. Right now, the snoring part has stopped. Not bothering anybody now, however, my sleep disorder is still bugging me coz my time at work is wasted during those moments, and it is really affecting my performance now.

Is there anybody here that can help me understand what is really happening to me? Any reply would be much appreciated.

Thanks in advance! :)

Sleep Disorder is affecting my job