QueenKong - Only two things I might add to the excellent advice you've already been given:
1) Getting appointments moved closer. It really does help to keep asking (nicely of course) and if that doesn't work maybe you could have someone call for you and cry a little on the phone about how anxious you are and that you need an earlier appointment. They can move appointments around. After my son got an important appointment moved closer, and later when he was recovering and not in urgent need of a close appointment, the hospital would always call me to see if someone else could have his appointment and I always said yes and they gave us a later appointment.
2) Something Marie mentioned struck a note with me. Low light during winter months can lead to Seasonal Affective Disorder (SAD). If one doesn't get enough Sun, it can lead to low energy, and being tired. Recently, a blood test that I had showed a low level of Vitamin D, which improved greatly - after being given large does of extra Vitamin D plus getting out in the sun every day. Just something to think about or ask the doctor.