Mother-of-two Hannah Freimanis, from Carmarthenshire, said she suffered flashbacks after the traumatic birth of her first son Marleigh.
They got worse after she had an equally traumatic birth with her second son Sebastian three years later.
She is one of the estimated 20,000 women in the UK who suffer from the condition every year.
Hannah said it got to a point where she was reliving the most harrowing parts of the birth up to four times a day.
After four years she was finally diagnosed with postnatal PTSD and treated and is now coping with the condition.
Here, she tells her story.
• For more about Hannah and postnatal PTSD watch Wales Live on BBC One Wales on Wednesday 6 December at 10.30pm. You can also watch the programme on iPlayer after it is broadcast.