Didn't think it would be this emotional

My twins started daycare this morning. I just cannot believe how emotional I felt. I've had a lump in my throat all day, too. They didn't cry or anything. Luckily, we got there right at snack time, so they were given a chair and sat down to eat an orange. I don't think they even noticed that I left, which is good. It would have been hard if they were upset. But who knows how the rest of their day is going. Will they be happy to see me after work or will they want to stay there with their new friends? I know parenting is going to be fraught with this sort of stuff and I'm not ready.