Some degree of social anxiety is definitely common, but if it’s extreme (needing to go somewhere silent & isolated after a one-on-one conversation with someone new), it could suggest some degree of autism. It might be worth consulting a psychiatrist. I know an autistic person who has successfully coped with extreme social anxiety through a combination of medication and therapy.
For me, it’s a combination of noise and crowds, and COVID-19 has made it that much worse. There are times (even pre-COVID) when I just have to get out of a loud, busy situation and de-stress. Ironically, substituting my own loud sound (classical music on full blast) often works best.