Feeling pressure to CIO

Okay so my daughter is 7 months. Her pediatrician suggested I stop night feedings a month ago at her 6 month checkup. I have been slowly weening and got her down to one feeding at night. But she also gave me a pamphlet on doing CIO method because we cosleep. I was telling her how my husband and I haven’t been too intimate and we are getting horrible sleep. She wakes up a lot because she’s hot or needs more room. So she suggested this being the best way. After a month I felt more and more pressured that this was in fact the only way. I watched YouTube videos and read articles. So here I am, night 4 of trying CIO. My daughter has screamed for 30-45minutes every night for the last 4 days. I feel as though I’m failing. She won’t sleep just rocks back and forth on her hands and knees. I need desperate help. After the 45mins is over I will bring her into bed with us and she will fall fast asleep.