I think we all know how you feel. You do laundry or cook dinner and think well if I can do that then I can work, but then you do a little to much and bam, you are down for the count. I know when I think I feel strong, I will walk out to the mailbox and by the time I walk back to the house, I am done for at least 2 hours.
It is very frustrating, but remember MG is not like a cold, you won't just "get over it" you have to readjust your life around it. If you can get away with part-time work then that would be wonderful. I miss work so much but I know if I go to work, then I can't do anything else. When I take a shower I need at least 1 hour to regain my strength, thank goodness I have curly hair so I don't have to spend time doing hair or that would be all I could do in a day.
You are in my thoughts and I hope everything works out for you.