When it just to much

Today seemed like my oldest who is 6 thought we were going to have a good day until he hit his 2yr sister sent him to his room and started from there throwing things screaming ect. Today isnt my day now finally he has calmed down. Thank god. Between the therapy the grounded the chart system we have done taken everything out of his room time outside and ect. He is still a run for my money. Smh any suggests on relaxing my self. I am trying so hard to keep my cool. I dont need judgment I have my hands full with 3 kids and just became a single mother advice would be nice even discipline advice be good to.