Courtesy Delia Chatwin(NEW YORK) -- Carli Williams, of Texas, went from following an influencer on Instagram to crediting the woman with saving her life. Williams, 33, said she felt a small lump in her breast last year, but was told by doctors that it was probably just a cyst. When one doctor told her she could get an ultrasound if she wanted to, Williams, a fitness trainer and mom of three young kids, said she did not follow up. "I was like, 'She told me I did not have breast cancer and I'm not going to go out of my way to schedule this,'" recalled Williams. "I...