The 34-year-old broke the upsetting news on Twitter on Thursday, and she's admitted they still don't know what is wrong with George.
Speaking to The Sun, Kerry said: "It was so frightening. We just want to know what's gone on and whether it might happen again."
Last week the Atomic Kitten star tweeted: "Asking you all to say a prayer for @mrgskay been taken to hospital with signs of a stroke xxx [sic]."
Former rugby player George, 35, was quick to update his followers, adding: "Hoping it's bells paisley (think that's how you spell it) xxx [sic]."
Kerry was immediately flooded with well-wished from followers after her scary revelation.
One wrote: "Thinking of you both and really hope George is ok Kerry xxx [sic]."
Another added: "omg hun praying for him & you all. My bf had one a few weeks ago. Loads of love to you all xx [sic]."
Kerry and George married last year, and have a one-year-old daughter together Dylan-Jorge Rose.