Answer:
Stress can affect your body in many, many ways.
For example, stress can make you have muscle tension, change in eating habits, sleeping patterns, headaches, and in some cases, depression, usually mild.
Even though this is not asked, a good way to counter stress is jogging, exercising, going to bed everyday at a fix time, for example, at 9. Do not worry too much about things, and look at the bright side of life.