I am pleased that you plan on seeing your family physician soon. Make sure that he/she gets copies of your sleep study and any other tests. I am not a doctor, but with you finishing school it sounds as if you might have a lot of stress. I used to hate hearing that from my doctor because it seemed like they were saying, I don't know, it is probably stress. I was diagnosed two years ago with emphysema and I am amazed at how I can actually feel how stress affects me now. It is a very powerful thing and can manifest in many ways. Also, I would urge you not to rule out depression. Can make you feel very fatigued. Good luck to you and hope you get to the bottom of this.
You really should get a CT scan with contrast to rule out pulmonary embolism(blood clots in the lungs). This is a real possibility, especially if you're on birth control pills. Please do a google or yahoo search and check out the symptoms.
DO NOT DELAY!!!!