My nightmare finally came to life

Ever since I had my LO I have been dreading the day that we are sitting around all perfect and then all of a sudden out of nowhere my little boy who is normally very steady takes a nose dive of the couch towards our wood floor!! Well that day was today... 👶🏻😭 I threw my arm out to catch him and instead of landing on my arm he leaned forward way more than I expected and landed head first of the floor. I instantly had him in my arms checking his head through blurry eyes. No red, no cuts, no bruise, no bump. Some how he managed to only hit the back top portion of his head and only for a second before I had him in my arms. I felt TERRIBLE!! I had tried to catch him!! My husband takes him from he, checks over him and then starts yelling at me. Now to me who is already sobbing and in a fit of tears because she just managed to not only let her son fall off the couch but also failed to catch him. I told him to just leave me alone right now because I'm upset and I just need to be left alone. No matter what he said I didnt want to listen to him. But he keeps going telling ke that this could have been preventable. Like dont you think I fucking know that?! That's why I feel like shit!! But he keeps yelling and then changes to yelling at me for not listening to him at all. Because I cant handle him yelling at me right now at 730 in the morning. How should he have reacted? Make sure baby is ok, wait for me to calm down, explain to me how that could have been avoidable instead of yelling at me. He tried to make it better by saying he loves me and shit but at this point I was just like, get out of my house, go to work. I'll see you tonight when you arnt in a pissy attitude. (Getting ready for work he's giving me attitude for not having clean laundry when hes the one that wont fucking do the laundy!!!!!! Half of this was a rant on my husband and the other half, my poor baby. He's okay though, no swelling and he's been fine all day after, maybe a little cranky but that's it. I lasted 6 months without dropping or letting my kid hit the ground :(