Give up for the night??

DD is 11 months old. We've co slept since birth. I've recently decided to start putting her in her crib. She will stay there for a few hours-half the night. It's been hard, but I think it's best for both of us. I usually pat her and sing or pat her and read. Tonight she's not having it. She's freaking out. I finally decide to put her to sleep and then put her in the crib. She wakes up within seconds. I gave it my best to let her CIO and just couldn't do it. She's back in my bed comfort nursing/pacifying. Should I keep trying to give it up for the night? I don't want this to set us back but I don't want her to be overly stressed.