Chrissy Perkins was 22 when doctors found out her lungs were full of blood clots.
"I'm very, very lucky to be here today," says Chrissy, who'd been taken to hospital by her mum after she started having fits.
Now she wants to raise awareness that the combined contraceptive pill can, in rare cases, be life-threatening.
Chrissy, who's now 29, first went on the pill aged 16 to help with her painful periods.
Read the full account on the BBC Newsbeat website.