Everyone will find at a point where he or she will be at the very down situation of in other words, at a very frustrated point. There are thousands of people out there who are having the worse day of their lives and what keep us going is the faith. Have faith in yourselves.
Swearing might come in handy but it might somehow hurt people around us. We never know. We have to be strong and believe in your faith and PATIENCE is very important. And God will always be with you! p/s, I know I'm no preacher, but I know it's the right thing to do.