Daycare after returning to work from maternity leave

This is something that I keep thinking about and I am so uneasy about leaving my child at a daycare , with people that I don't know . For you working mamas , will your baby be left at a daycare , with a babysitter , etc ? I know that I'll constantly worry and I don't want to feel like I'm abandoning my baby . It hurts me to know that someone else will be doing the job that I should be doing and it has me very emotional . I ma a first time mom.