Venting after a Meltdown

I knew it was going to be bad when Liam got off the bus. He threw his bookbag and stomped to the house. One thing lead to another until I had to wrap him. It was like a scene from the exorcist:  screaming, cursing, crying. I don’t know what I’ll do when he gets bigger. I’m not as young and strong as I used to be. I didn’t realize how emotional this makes me. I want to run off and cry. When will this stop?