Sorry to hear of your troubles, bernie....depression is the pits.
Glad you are seeing the GP so soon. That should help, whatever they suggest.
Try to establish some sort of routine for yourself so that you get up about the same time each day, get washed , dressed etc then set small achievable goals for yourself like walking to the shop for a paper, clearing the washing up, whatever you are pretty sure you can do without over-doing things.
Lack of energy and lack of 'oomph' are , unfortunately, all part of depression, so you have to try to make yourself do things whether you 'want ' to or not.
Slowly, slowly, though.
All the best.