reported.
She said she was "young and naive" when she decided to leave the UK and join ISIS.
She added: “I knew it was a big decision, but I just felt compelled to do it quickly. I didn't want to be the friend that was left behind.”
Shamima said recruiters preyed on the guilt they felt at seeing Muslims suffer in the Syrian conflict.
A filmmaker who met her at a refugee camp in Syria last year said she is not a threat to anyone, but is broken and needs help.
Can I come home please, pretty please?
Shamima Begum
Spanish director Alba Sotorra told : "In the beginning, Shamima was like a ghost just sitting there, covered, lifeless, like a marionette, a doll."
He added: "Her lack of ability to express her feelings made me feel deeply sad for her.
"Then, maybe two or three months after I met her, we had this game with the kids.
"The kids were playing with kites. Shamima was always very silent.
"And she sat on one of these carts watching. I saw a teardrop fall from her eye. It was the first time."
Shamima gave birth to three children in Syria but all of them died.
In a documentary, which was shot in 2019, she said that after the death of her third child, a son, she stayed up all night with his body.
She said: "He was my last hope, he was the only thing keeping me alive. I didn’t know how.
"That day I just cried for all my children. I cried for all of them. No one could help me, no one could do anything."
Shamima was defeated in her legal battle to return to the UK for a court appeal over the removal of her British citizenship earlier this year.
The Supreme Court uninamously ruled in favour of the Government and said Shamima cannot come back to the UK for a court case to reclaim her British passport for the safety of the public.
Delivering the ruling, Lord Reed savaged a previous judgement by the Court of Appeal and said it had "made its own assessment of the requirements of [national] security" without any "relative evidence".
Shamima Begum felt like she wanted to kill herself after her first two children died while she was pregnant with her third