If you have a serious concern about your physical or mental health, consult your physician or other qualified professionals. Read about MCAD if you have access to medical journals or the Internet. Self-help books on stress may also be helpful. Knowledge is power. Exercise to release frustrations, as well as to keep you fit.
Hobbies are a good stress reliever, as well.
Thought stopping is not recommended for individuals working through grief. Thoughts and emotions MUST be processed in order for healthy grieving to occur. Find a physician for your child that you feel comfortable with and will take your concerns seriously. Take time for yourself. For our sake and our families' sake, we should all make an honest assessment of our current coping strategies and strive toward healthier ways of dealing with stress.