Today I realized that I'm a bad mom, I just cried, my throat is sore, …

Today I realized that I'm a bad mom, I just cried, my throat is sore, I hate myself now. I made a mixture for my little one not 37 degrees but somewhere around 38 it was hot??? I read on the internet that the mixture needs the right temperature or you can put the bottle to your lips and see. It was always cooled down before, but then I saw a post from a girl saying that you only need to check the mixture with your wrist, and I started and as it turned out, my daughter's mixture was always hotter than 37 degrees ? Now I think I should get an ultrasound of her stomach? Or what do they do? Maybe I caused her burns?