Dropped son on his head

So we were at the ER today because I dropped my son on his head. I was holding him and swaying him side to side so my husband could do a call for work without an upset baby in the background but he wiggled out of my arms and fell right down and hit his head on the cat bench that happened to be standing below me. I have been so upset all evening. At the ER they told us he merely scratched and bruised his face and the consequences would be minor but I cant feel but feel absolutely horrendous. Been crying all evening. My son instantly started crying after the accident and was alert and even happy at the check up at ER. But still, it feels like I threw him and let him down. My husband and I both work full time from home now and we take turns in between meetings to look after him but I feel like he is getting bored and like I am letting him down as a mom. Work is very busy all of a sudden but I need to primarily be a mom now and I feel like I wasnt. Sorry, just needed to get this of my chest. I hope I didnt cause permanent damage to his brain or head by trying to act as if I could juggle it all, because I clearly can not. I need a break.