daycare

I'm a teacher and go back to work this week. I'm practically having anxiety attacks over sending my LO to daycare. We investigated the daycare before she was born and have had her spot reserved for a while. They genuinely seem nice, but I keep worrying that she'll think I abandoned her or that if someone's mean to her she can't tell me. I'm doing the best I can, I know, but I feel awful. Our relatives live too far away for us to drive back and forth and there is no way I could be a SAHM. Can any of you moms who have already sent your infants to daycare offer me some advice/encouragement? The mommy guilt is real.