Tough break, hope all is well now and your back in full circulation soon. But like Mike says ring round existing customers and ask the question, you will be surprised how many jobs you pick up, also any mobile numbers you have send them a quick text. if they don't need you now they can easily store your number in their phone.
I also keep diary notes of any one who says I don't need anything at mo but would like x doing in x number of weeks. this means you can give them a quick call and fit them in around other local work.
Also having post cards explaining that they had their carpet cleaned 12 months ago and do they require anything at mo, I find a lot of customers save these cards if they don't need you yet (a lot easier to find in the draw than a business card)
John