Did anyone see it coming?

Some Facebook messages seemed to be a foreshadowing of Monday's tragedy, indicating something was wrong.

Sheri Shermeyer

But others showed a happy mom and her young son, seemingly eager for his second Christmas.

The Facebook page of Sheri Shermeyer showed mixed messages of emotions and turmoil, highs and lows, that may have been rolling through the 40-year-old mother's mind over the last couple of weeks.

Police found Shermeyer and her 1-year-old son, John Shermeyer, dead in her home Monday on the 12000 block of Baltimore Street in Shrewsbury Township.

She died of an apparent self-inflicted gunshot wound, York County Coroner Pam Gay reported. The Pennsylvania State Police at Loganville say this came after she intentionally suffocated her son.

Autopsies for both are scheduled for Wednesday.

Her final post came Monday in what looks like a suicide note.

"I want you to know that I LOVE John Russell more than anything in this world," she wrote in her note. "I always thought of myself to be a strong person. I've been through Hell and back and still had a smile. I've lost too many people; family, friends, pets, jobs etc. But as of late I don't feel so strong. I have been slowly dying inside. I'm confused, just torn down..."

Did anyone see it coming? Could they?

"R.I.P. to a wonderful friend, classmate and a beautiful soul," one friend wrote on her wall.

"I'm lost for words," another wrote. "I'm still in shock I wish you would of talked to someone or left that situation. You and your son meant so much to so many people. You will greatly be Missed!"

"I am sorry you felt you were alone," another wrote. "May you and lil John be in peace."

Another indicated she had just talked to her the day before and saw no signs.

On Christmas Day - the day before their deaths - Shermeyer posted a photo of her son, lounging in a blue PAW Patrol chair.

And on Christmas Eve, the toddler was smiling big, wearing his pajamas.

Sheri and John Shermeyer.

That was the same day his mother also posted: "Grief never ends... but it changes. It's a passage, not a place to stay. Grief is not a sign of weakness nor a lack of faith... It is the price of love."

And in between more posted photos of her child and an array of antique cars and trucks were messages of hope and messages of despair.

They ranged from "The future depends on what you do" to "What screws us up most in life is the picture in our head of how it's supposed to be."

And just last month, on Nov. 7, Shermeyer posted a suicide-prevention phone number.

"A simple copy and paste might save someone's life," was written below the number.

And Cindy Richard, director of the York County Suicide Prevention Coalition, posted on the page that support groups are available, and anyone who needs to talk should contact 717-227-0048.