Does cry it out work? I can’t do this anymore ..

Takoda

She slept fine from birth to 5 months... then she got sick and for the last month and a half has needed to be rocked or fed to sleep. She used to sleep through the night every night, now wakes up 2-4 times at least.. I’m alone with her all night and day. I can’t keep getting up every hour or two to rock her. It takes 40+ minutes sometimes to rock her and put her down.