I’ve been so horrible lately

During my first two trimesters I was really good about my diet and also gave up all sodas. Lately I’ve starting drinking soda again and today I had half a bag of potato chips and 6 little debbies cakes. I feel like I’m failing as a mom. I’m not trying to make anyone else feel bad who is in the same boat, I just need a little encouragement from people who know how I’m feeling.