Update 4.30pm: A Bunbury teenager who had been missing since Saturday has been found.
Luke Craig had made a plea for his 17-year-old girlfriend Cheyenne Marks, who is two-months pregnant with his child, to contact him.
She had not been seen since she left his house on Mawson Place in Withers about 10am.
"The last message I got from her was at 9.58am saying she was heading to her mum's house near Newton Moore (high school) but we found out on Sunday night that she never arrived," said Mr Craig, 19.
"I'm worried sick about her. I've been on my Facebook and her Facebook contacting her friends and no one has seen or heard from her since that time."
Mr Craig said it was not unusual for Ms Marks to go missing from her family's house but she always kept in contact with him.
She has not returned multiple phone calls and text messages.
"It is out of character and unexpected for her not to be in contact with me."
Mr Craig said they had been together "on and off" for two years.
He did not know what she was wearing on the day she disappeared but said she was a Maori - from New Zealand - and has a slim build with long dark hair.
Bunbury operations sergeant Phil Nation had urged Ms Marks to contact her family or Mr Craig to let them know she is safe.
"She has gone missing before this but she has never done it with her present boyfriend so there are concerns for her welfare," he said.