I got a bit of a cold these days but I decided to go out anyway. I was out with friend the other night and I approached a girl I recognised as a friend of a friend. We start chatting a little, I knew her bf was right there and she wasn't my type, but I decided to keep talking just for practice and fun.

By the end of the conversation, I start coughing out of nowhere, right when she was about to leave, she asks if I'm okay, I try to reply but feels like I suddenly lost my voice and I can barely whisper.

Now, in that instance I didn't give a fuck about her, she left, I went back with my group, I drank some water and I was back in. The thing is that it happened so fast and I had physically no control over it.

What is usually the answer in this type of situations? Just a gesture and focus on getting back the control?