I think it is very strange that they didn't want to put you on cpap because of your "age"...very strange. If you have mild apnea, you shouldn't need treatment at all!! but if treatment is recommended, cpap, in my opinion, is the treatment of choice. But that's another thread.
Some people on the lyme disease boards were diagnosed with fibro, only to find out later that what they really had was lyme's! Seems many of the symptoms are similar. Many with lyme's have muscular/skeletal issues...that's just one reason I suggest you read at least the symptoms on the lyme boards (but I recommend that you read more).
I've had leg pain and I've read of many others who have also but those of us with restless leg/periodic iimb movements/nutritional deficiencies often experience movement/pain when we're resting or sleeping...not when we wake up! So your sister's situation is different from my experience and the experience of many others...but again, do review the lyme boards keeping in mind that MOST doctors are unfamiliar with the accurate diagnosis and treatment of lyme.
Take care, Moe, and keep in touch. I'll be thinking of you and of your sister.
Bethsheba