Going back to work after baby

I start a new job in a little over a week and my baby will be just over 7 weeks. I haven’t been without her, and I feel extra attached to her. Like that I need to always be around her. We have to put her in a daycare. I just feel like I’m the only one who can take care of her the best. So how did you other mama’s get through the days at first when you went back to work? I’m not looking forward to this at all, and I’m super anxious. I’ve been having nightly nightmares about bad things happening as well. So any advice helps.