English unsuccessfully sued the businessman for constructive dismissal, claiming she was forced out of the "sham" job she won on the BBC show in 2010.
Sugar also failed in his bid to countersue English for £35,000 in legal fees last week, after which the former banker claimed she was "broke and on [her] knees".
Speaking to ITV's Daybreak this morning (September 30), English revealed that she is now unemployed and looking after her children Edward, 7, and 5-year-old Frank alone after her plumber husband walked out on her.
"It's horrendous. My husband has left, he's in pieces at the moment, as are my children, and I've been trying to prepare for a legal case with no money," she said.
"I haven't slept for about six weeks... and [I'm] trying to cope with the fact that I'm now an unemployed single mother. It's a nightmare, it's a living nightmare."
English claimed that she didn't regret taking legal action against Sugar, stating: "I've spoken my mind. I've spoken the truth and I've stood up for myself and I've had to pay for it dearly, but I will never apologise for it... why am I not allowed to stand up for myself just because someone's powerful?
"I think [Sugar's legal costs victory] would have just been the nail in the coffin because I don't have anything to give. I was relieved - very, very relieved."
English again insisted that there was nothing "malicious" about her actions, explaining she found the job so "unbearable" that she "couldn't physically stay there".
"All I care about at the moment is my kids," she said. "Dad is not at home, Mummy is crying, they don't know why... I suppose at the time I needed the support I've found myself completely alone.
"I don't think it can get much worse. Well please God I hope it doesn't."