Concrete dust from Jackhammering?

didn't wear a dust mask the other day when my friend (he didn't either) was jackhammering a small section of concrete in his basement. There was some dust, but not a whole lot as the room was large. Plus we only used the jackhammer for 10min. I didn't realize anything about silica until I read about it later. Anybody else done this, and if so, any health problems? This was only a one time event, and I now know next time. I just don't want to develop anything as I am only 26. Like I said, there wasn't much of a dust cloud and we tried to ventilate the area.