A missing elementary school teacher in Maine wanted emergency medical help to treat her anxiety before she disappeared on Sunday, her husband said.

Jay Westra said his wife, Kristin Westra, 47, told him early Sunday that she had been experiencing anxiety and was “worried” after having some sleepless nights, he told NBC News. The husband, who works as a pediatric oncology nurse, said he then contacted a friend who works as a licensed clinical nurse practitioner, who saw his wife later that afternoon.

“Kristin met with her while my daughter and I were in the room next to her playing cards,” Westra said. “And then after that, they left and there was a safety assessment and Kristin was not at risk for any harm to herself or anybody else.”

Jay Westra said his wife planned to get some additional blood tests conducted the following day before they returned to their North Yarmouth home. She later went for a run as her husband went to the grocery store with their daughter, but they all returned home for dinner together.

“She told me she felt better,” Westra said, recalling his wife’s comment to him before going to bed. “We had a plan. And Kristin is a person who, when she has a plan, she sticks to the plan and she follows through and she does things well every time.”

He said his wife was restless while sleeping that night and he noticed her missing from their bed at about 3:30 a.m. Monday, but assumed she had just left to sleep in another room.

“And then after my shower, I walked by [the room], did not see her, panicked slightly about that, checked on my daughter and then went to the garage where we have a small kitchen set up while we’re doing renovations,” he said. “She wasn’t there; I started to really worry.”

Kristin Westra had vanished without a trace, he said, leaving her keys, purse, phone and car behind.

Jay Westra said he searched for his wife around several places where she frequently ran before stopping at a park, where he asked a sheriff’s deputy for help.

“The sheriff’s office has been working hard since then and they’re still working hard,” Westra said. “The state police interviewed me and they are still working hard. And not too long after that, in the afternoon, the Maine Warden Service started getting involved. They started doing organized woods search with dogs, and flashlights and grid work.”

Westra said he was “losing track of the days and the time” as the search for his wife has entered its fourth day.

Cumberland County Sheriff Cpl. Scott Stewart told the Portland Press Herald that search teams were following up on credible new information regarding a possible sighting of Westra late Wednesday.

“I don’t want to get into specifics but it is credible information and we have resources geared in that direction,” Stewart told the newspaper.

Stewart said there was no initial indication of any foul play, but the investigation was ongoing.

“We wouldn’t be doing our job if we didn’t always keep that on the table,” Stewart told the newspaper.

A prayer vigil for the missing woman was scheduled for Saturday in North Yarmouth, Jay Westra announced Thursday on Facebook. He earlier pleaded with his wife directly for her safe return.

“Kristin, no matter what, come home,” Westra said. “We’ve always taken care of everything, we’ve solved every problem. We’re a team, we will be a team.”