Don’t worry. The guy who hit me was wearing 16-0z boxing gloves, and so was I. I got hit because I was in a boxing seminar, and I’m not very good at boxing.
I learned some skills in that class (and in other martial arts and self-defense classes), but more than that, I learned that I’m not made of glass. I can be hit. I can hit back (or try to, at least). And I can learn where I left the opening. I’m not saying getting hit is awesome, or super fun, or a good idea to do every day. But it’s instructive to get in that position, to get under the gun, and realize that you’re strong enough to handle it.