I feel horrible...

My boyfriend and I were on the phone, and he was comparing his size to a pen (idk why) and I was laying down half asleep, and he said “it’s small isn’t it” (I thought he was talking about the pen, which was a lot smaller than his thing, but he wasn’t) and I said yeah, not really thinking, and when he looked at me seemingly mad and sad, I asked “what’d I say” and he turned off his camera and won’t believe me when I try to explain. I feel absolutely horrible.