Sherwood admitted he feared the worst when the 23-year-old pushed Geoff Cameron, saying: "My heart was in my mouth.
"He's the match-winner for us today. I thought he was performing really well and I didn't really want to bring him off but I had to defuse the situation.
"I've never heard a crowd so hyped up. I thought I had to get him off and send him to the dressing room - out of sight, out of mind.
"He's still a young guy, he's still learning his trade. We're smiling because we haven't been reduced to 10 men and he can learn from it.
"It is a positive because we've come away unscathed. We've got a clean sheet and Danny will grow from that.
"He did make the referee make a decision and he shouldn't really be putting himself in that situation. I've told him."