Tanai was rushed into surgery immediately due to internal bleeding, before going into septic shock.
She had her uterus and ovaries removed, which had been 'blackened' from the inside, Kidspot reports.
Her toes then began to turn black due to the loss of blood flow.
The young mum then needed to return to hospital to have all of her toes on her left foot and also the tips of her right toes removed.
Tanai's IUD was inserted too soon after childbirth, and her healing uterus 'pushed it up' into her other organs.
'Every day I think about what happened and wonder, why me?' Tanai said.
'Sometimes things happens in your life and you don't know why.'
Tanai's has a Gofundme page and is raising money to help support herself and her daughter.