The girls didn't look after him today, I feel very guilty. I left my s…

The girls didn't look after him today, I feel very guilty. I left my son for a second and he fell on the floor from the sofa. It wasn't high, but he started crying hard. I took him in my arms and calmed him down. It seemed like everything was okay, I looked at his head, there was a red bump on it, but he is still so small. I can't calm down yet. I still feel terrible. Tomorrow morning I will go see the pediatrician, but everything is going badly. I am really worried.