The end of a marriage is hard on the adults, but it might be even more difficult on the children. This is an upheaval of the only way of life they've known. They might be upset that their parents won't live in the same home. The fear of the unknown might be real for them. One way that you might be able to help them to cope with the situation is to help them learn how to express their feelings in an appropriate manner.
The end of your marriage can bring a range of intense emotions like stress and anxiety. This is perfectly normal, but it is also important to do all that you can to reduce their negative impact on your life and health.