The BB5 winner was found slumped in her bathroom on Wednesday following an overdose of prescription drugs and painkillers, reports The Sun.
The 33-year-old - who admitted that she was feeling suicidal after her eviction from the Ultimate Big Brother house last week - apparently told friends: "I want to end it all."
A friend staying at Nadia's council flat is said to have discovered her body and called for an ambulance. She was reportedly kept under medical observation on Wednesday night, after which she was declared fit enough to return home.
A source said: "This is a cry for help. She is very unhappy."