I slapped her leg....

I’m feeling like an absolute piece of shit mom. 😞 I just got my wisdom teeth out a few days ago and have dry sockets on both the top and bottom on the right side. My face is super super swollen and I’ve been in so much pain.. I’ve been on these strong pain killers that make me so out of it it’s hard to function. I was giving my almost two year old a bath. When I told her that we were done and that it was nap time she threw a huge tantrum and starting flailing around.. I put her on her towel and she started kicking when I was trying to put her diaper on... well she kicked me hard right in my face where I am so tender and it caught me off guard... I didn’t even think, like a knee jerk reaction, I just slapped her thigh on her other leg.... hard enough you can see my three fingers 😞 I immediately felt so sick to my stomach and started crying right along with her. I kept saying how sorry I was. She pulled away from me and looked so betrayed. She’s taking her nap now but I can’t stop thinking about it and how absolutely horrible I feel... I’m still crying about it and I’m so ashamed at myself. There’s no excuse for what I’ve done and I’m so afraid that I’ve hurt her little heart and broken her trust. I just need to confess what I’ve done... am I not fit to be her mom? If someone sees the mark is she going to be taken away? She is my life and I don’t know what I’d do without her I seriously didn’t mean to slap her let alone that hard.. My heart is broken what do I do 😞