Toddler bit me

My toddler and I were playing board games and she was so happy she came over and kissed my cheek. I cuddled her and she was laughing and laughing. Then all of a sudden she bit my ear. Now I have a really high tolerance for pain but this was another level of pain. I really thought she was going to bite my ear off. It was so painful I just stood up and started crying. I think she got scared because I was crying and I don’t think she’s ever seen me in pain before like that. She started crying. And it woke up my other child who then started screaming. It was very overwhelming. I ran to look in a mirror (like I said I really thought she freaking bit my ear off) and she was grabbing my legs. I cuddled her and said that really hurt and I calmed her down. She said she didn’t want lunch she just wanted to nap. Now I’m so so upset that I had the wrong reaction and I’m beating myself up over it. I’m not even sure what I’m looking for but I just feel so so so horrible.