5 month old rolled off couch onto carpet feel like terrible mom

I feel terrible I stepped away for a quick moment which was stupid of me because he knows how to roll but I felt because I didn’t take my eyes off him and they were on baby … it happened so fast…. He fell not that high (an inch or two over 1 ft) thank God but he cried and then I ran and consoled him. I freaked out honestly at the moment I can’t even remember how he landed. All I know is I said to myself that could have been much worse and thank God. Then when I grabbed him and consoled and hugged kissed him he was smiling and fine quickly.. Now I’m so scared. Has this happened to anyone???? Should I have taken him to er??? I am so mortified feel like a terrible mom and embarrassed I would do that. Are there things to watch for??? I checked his pupils…. I checked him out no pain when I touched his head neck limbs…. It happened so fast I keep reliving it and cry. Now he is sleeping in my arms… it happened about 45 mins ago and it’s been 4 hours since a nap so…. Should I be worried. I already feel like a terrible mom please help? Advice??