I regret nursing my daughter to sleep

I have a 15 month old and I’m 8 weeks pregnant. We have always co slept and she nurses throughout the night. Some days are better than others and she sleeps through the night but she has an ear infection so all she wants to do is nurse ALL NIGHT LONG and if I try to move to get comfortable she cries and wont let me scoot away from her. I’m exhausted, sick and my body hurts. I want to be her source of comfort but this is hard and I don’t want to put her in a crib because I’m against CIO. Anyone else experience this? I just need to know I’m not alone in the struggle 😭