My puppy inhaled smoke and now I’m worried

Hi, I just made this account to ask for advice or reassurance or something. I have a 7 week old pit bull puppy. We were laying in bed when I hit my pen and got choked up and accidentally coughed in his face. I never hit my pen around him but I was trying to fall asleep and couldn’t. I got on google and now I’m so worried about my little guy. Is he going to be okay? He’s not showing any crazy symptoms, he’s just sleeping next to me like a rock. Please someone help give me answers.