You definitely have my support Nelly. And by know you should know that I consider you a friend!
You're not lazy at all! I know that well. Because of my insomnia, some days I don't have a lot of energy and have been called lazy before. I'm not lazy just tired and perfectly happy staying in sometimes.
I think it's such a great thing that you'll be working from home in your new job. That will help you keep things at your own pace.
I agree that the diagnosis is a good thing. Now you know you aren't crazy and can get your doctor to work with you on this.