Tell me I'm not a bad mom

Today was just awful. My house was a mess, my 9 month old twins wouldn't stop crying, I hadn't showered for two days and felt gross, and then my three cats made a mess of their food. I broke down and cried for a good hour. My husband watched the kids as I did so. And now we are going to drop them off at my MIL's house for the weekend because I need a break. I'm 19 and this was an unplanned (but not unwanted) pregnancy and sometimes it's so hard to take care of myself and two babies. Plus my husband and 3 cats. I wouldn't ever go back and not have my babies, but I feel bad because there are sometimes I wish I could just be young and have fun like I used to.