I'm a bad mom

I'm feeling so horrible today. Feeling like my babies deserve so much better. My daughter will be 2 July 16 and my other daughter will be 1 July 17. Today my almost 2 year old poured out my entire can of formula all over the living room and her sister. I got frustrated and raised my voice. I walked away to calm down then came back cleaned the mess and then sat on the couch cuddling with both babies. Then I put them down for their usual nap, neither one would go to sleep and the oldest kept climbing into the babies crib ever 5-10 minutes and after the 10th time of pulling her out and putting her back in her own bed I yelled. I feel horrible she's not even 2 yet I shouldn't have yelled. I'm just so frustrated