Life without challenges is a life without any meaning. All of us face challenges in all areas of our lives ,be it mental , physical or domestic. If we get cought up in situation, we might get stuck .If we keep thinking about the situation we may end up making situation bigger than it really is. Constantly thinking about"what's going to happen? Makes our imagination  run wild and create worse case scenario.
Remember! Our thoughts lead us to our destination hence if we keep thinking "i m going to fail, we would likely fail so we need to decide whether to continue to live like this or strong and stable.
If we want inner stability we need to pay attention to our thoughts . If there are any unnecessary waste thoughts ,apply a full stop. When it's necessary always try to keep your thoughts positive and powerful.