"It was 4am in the morning and after many miscarriages I fell to my knees in sadness and desperation thinking this pregnancy was another one lost," she continued.
"We rushed to the hospital. When they hooked me up to the monitors I saw the look on the technicians face, one I’ll never forget. It was one of relief.
“'Your baby has a very strong heartbeat.' She said. 'She’s not going anywhere, for now'."
While in hospital, the former Pretty Little Liars star was informed she had a "sub-chronic bleed" which caused her to bleed through most of her pregnancy.
As a result, the mum-of-two said she avoided "connecting" to Lennon.
"I was too scared to love something so deeply, something that might not ever come to be."
Much to Tammin's relief, on January 17th in 2019, Lennon was born via c-section.
"When I saw her face for the first time I sobbed. She was here. She was real. She was safe. I experienced the most intense feeling of love I have ever experienced. All the trauma and pain of the unknown washed away. We were all finally alive," she said.
Tammin's vulnerable post marked Lennon's fourth birthday, with the Hannah Montana alum saying that her and partner Sean McEwen have received "nothing but joy and affection and love" from their second daughter, who has an older sister named Phoenix.
"She has healed so many parts of me and taught me to trust in divine timing. Lennon Bleu, we love you more than you’ll ever know. Thank you for saving us. ❤️."
If you or someone you know has been affected by any of the issues raised in this article, help is always available. You can call the SANDS 24/7 bereavement support line on 1300 308 307 or visit the website.