Vicki Gunvalson Vicki Gunvalson

The Real Housewives of Orange County's Vicki Gunvalson was hospitalized Thursday after experiencing gastrointestinal problems, according to People.

The Bravo reality star says doctors have not yet determined what is wrong with her.

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"I'm still in the hospital and we still don't know why I'm bleeding internally yet," Gunvalson told the magazine via email Friday. "I am having a colonoscopy so hopefully that will give us some indication."

Gunvalson, 47, filed for divorce from husband Donn a week ago after 16 years of marriage. She told E! that Donn has visited her while she's been in the hospital.

"It's amicable," Gunvalson says of the divorce. "We're perfect. We're not fighting."