doing ok at week 20!
I'm a lawyer and, at around 7 weeks, I had an absolutely SCREAMING match with an opposing lawyer on a case. This only happens to me about every 2 years. I have to admit I let it rip into him! It was surprisingly cathartic

and no harm seems to be done to our little one at 20 weeks. I wouldn't worry - your incident seemed like it was over with quickly. Recurring stress/anger might be of more concern.
Hang in there! SMRC