Sarah Cooksey Andrew Speaker and Sarah Cooksey

Andrew Speaker and Sarah Cooksey were engaged in December.

Just weeks later, they learned Speaker had a drug-resistant strain of tuberculosis.

"It was a shock," Cooksey said of hearing the diagnosis. "He went in because he had fallen and was worried that he had bruised a rib. So he went in for a chest X-ray and they discovered this."

Cooksey told Diane Sawyer in an exclusive interview on "Good Morning America" she had no second thoughts about going forward with the wedding.

"Oh, no, I love my husband very much," she said. "And I wouldn't change a thing. I wouldn't trade whatever time I have with him É no, no second thoughts, no."