The Girls Aloud star and her professional partner Pasha Kovalev earned full marks for their show-stopping routine on last weekend's (08Dec12) show, but Walsh hurt herself during the dance and sought medical advice.
Walsh has been taking painkillers and anti-inflammatory tablets to ease her pain, and is still planning to perform on Saturday's (15Dec12) semi-final.
She tells Britain's The Sun newspaper, "It's been tricky to rehearse because it hurts when Pasha tries to lift me. I went to a doctor and I've been given painkillers and anti-inflammatory tablets - I feel like my body isn't coping very well at all.
"Despite the injuries... Last week's scores definitely gave me a boost. No matter what happens now, I was really pleased to make those improvements that got us a perfect score. That was a brilliant moment."
However, Walsh admits she's struggling to juggle her rehearsals with her commitments to the girl group, adding: "When I signed up, I probably wouldn't have expected to get so far in Strictly!
"But I knew about the Girls Aloud work when I started, so although it's been tricky and very busy, I wouldn't change it for anything. I must admit, I've had a few moments where I've thought I'm losing my mind."
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