I know this is one of those how long is a piece of string questions, but I've coughed a couple of times this afternoon - maybe 2 or three times.
I'm fairly sure it's just because I have post-nasal drip (ew) from a cold a while ago and am sitting in an awkward position where it's not just dripping down my throat properly. I'm not going out for the rest of the day anyway so I could see if I cough any more, but how often do you have to cough to self-isolate?