LAS VEGAS -- Danica Patrick said she doesn't have a concussion from Sunday's hard crash at Phoenix, but she joked she might have one from Thursday night when a rock hit her in the head.

"I feel like I got a concussion last night when I got hit with a rock at the [Las Vegas Motor Speedway] dirt track," Patrick said Friday. "It's really sore. It hit me straight in the head, and I went to the ground. Good thing I had a hat on, or I feel there would have been blood."

NASCAR officials spoke with Patrick Friday morning and asked her if she was OK. She said she was fine.

Patrick also said NASCAR medical officials called her Monday to ask her how she was feeling one day after a hard, head-on crash into the outside wall at Phoenix when a right-front tire blew out on her No. 10 Chevrolet.

Patrick's car bounced off the wall and was also hit at a high speed on the driver's side door panel by David Ragan's car, shearing off most of the sheet metal from the left side of Patrick's car. She was evaluated in the infield care center at Phoenix and released.

"They take your blood pressure and vitals and ask how you're feeling," Patrick said. "Then they contact you the next day to ask how you're doing.

"I told them my neck was sore, but felt fine otherwise. They said, 'It could have been worse and sounds like you're OK.'"

Patrick said she learned last year, after Dale Earnhardt Jr. suffered a concussion and missed two Chase races, that it's important to tell medical personnel exactly how you feel after a crash.

"It's your decision," Patrick said. "You can say you're fine, but if you're not, it's your risk. They can't tell if you aren't feeling well unless you tell them."

Patrick said her neck remains sore, but she doesn't expect it to cause her any problems this weekend.