I am so beyond pissed and upset. I left my son in the living room to be watched by my brother in law…

I am so beyond pissed and upset. I left my son in the living room to be watched by my brother in law and he was still in his car seat asleep. I said if he wakes him up take him out since he hates his car seat. I turn off the water and I hear SCREAMING coming from my son! I run out in just a towel and he's still in his CAR SEAT screaming his poor little head off while my brother in law sits there watching TV! I took over 15 mins in the damn shower! Ugh I am soooo pissed!