Vicki Gunvalson May Have to Return to the Hospital Following Four-Wheeler Accident

"Vicki has head and neck trauma. She was released last night at 2 a.m., but she's still dizzy and throwing up," a source tells E! News

Vicki Gunvalson is still on the mend, and her recovery may be more serious than anticipated.

E! News has learned that the Real Housewives of Orange County star, who was involved in a four-wheeler accident with co-star and gal-pal Tamra Judge over the weekend, may have to return to the hospital if her condition doesn't improve soon.

"Vicki has head and neck trauma. She was released last night at 2 a.m., but she's still dizzy and throwing up," a source exclusively tells E! News. "She does not feel good. If Vicki doesn't start to feel better soon, she'll be brought back to the hospital."

Another source tells us, "It was traumatic more than anything, but everyone is so grateful they are OK."

The reality stars were hospitalized after a four-wheeling accident in Glamis, Calif., on Saturday.

A spokesperson for Bravo tells us, "There was an off-roading accident that occurred on Saturday morning during production of The Real Housewives of Orange County. Vicki and Tamra were taken to the hospital after the accident occurred. They were both released and are continuing to be monitored. Everyone at Bravo, along with their fans, send them our love and support."

Thank you everyone for your prayers. #itwasntourtime @tamrajudge , @heatherdubrow

Posted by Vicki Gunvalson on Sunday, April 3, 2016

Tamra took a few of the ladies, including Vicki, for a spin in a Polaris RZR four-wheeler when it flipped and rolled several times.

Vicki was airlifted form the accident and taken to a local hospital where she was treated for minor injuries to her left leg and hip and was released Sunday morning. Tamra was also hospitalized for trauma to her lower back and hip and was released that night.

(E! News and Bravo are both members of the NBC Universal family).