(CNN) - Ann Romney, the wife of presumptive Republican presidential nominee Mitt Romney who suffers from multiple sclerosis, revealed she had a health "scare" leading up to Super Tuesday.
"There have been some days, like before Super Tuesday I was quite fatigued, and I knew I couldn't quit. I didn't tell anybody I was tired," Romney told "Entertainment Tonight" in an interview set to air Thursday. "I just kept going. I kept going."
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"I had a little bit of a scare," Romney added.
She was diagnosed with the inflammatory disease in 1998 and often discuses the experience while on the campaign trail in support of her husband's White House bid. The breast cancer survivor usually details how Mitt Romney supported her during the most difficult phases, saying he told her he would eat cereal for the rest of his life if it became difficult for her to cook.
The mother of five has said she now manages her MS symptoms through horse back riding and monitoring her energy levels.
She described how the disease manifests itself in her in the latest interview, saying she starts to "almost lose my words."
"I almost can't think. I can't get words out. I start to stumble a little bit. And so those things were happening and I thought uh oh, big trouble," Romney said of the lead up to Election Day in March.