My husband was doing some tuckpointing this summer on some old brickwork, and he sanded out the old cement before putting in the new. He worked like this for a few days, coughing at night and making me crazy. He finally put on the mask, but came in each day covered with the dust. I do believe the cement dust could have been an irritant to you also, but if your lungs are healthy, your coughing is probably getting rid of most of it. it's a good lesson tho, isn't it? A mask the next time for sure. And as an irritant, it doesn't go away that fast, but my husband's did after about a week or so. I also get the nervous cough from my nerves, although mine interferes with sleep. I think you'll be fine, but as we see all the time, a persistent cough should be looked at eventually.