You could be suffering from stress. If you are, don't worry. It's not something to be ashamed or embarrassed of, as many people become stressed at some point during their lives.
Many factors can cause stress.
Common reasons tend to be worries or problems at work, at home, with relationships or money. Once stress occurs, it's sadly not always easy to get rid of it. The more stressed you become, the worse life seems to be. However, beating stress is crucial, as the longer it's left, the more likely it is that other health problems, such as depression or a lowered immune system, could develop. Despite the fact that it may sound easy, for sufferers of stress it can be very difficult.