My advice would be just bite the bullet, put yourself out there and get a job. I don't know what you do, but there's plenty of work out there still, and even if you can't replace your former income, you might consider something that pays a little less, in the interests of getting back up to speed.
Under no circumstances should you rely on your GP to advise you whether to get a job or not.
Don't worry about being rusty - your talents will be easily spotted once you're back in the marketplace.
Best of luck with your endeavours! Wish you well.