That is an excellent observation that you have made. Stress is the cause of most disease..
When we find healthy ways of releasing stress and re-aligning ourselves with our environment many of our physical ailments just disappear.
Sometimes just by talking about our problems with people we trust, the problems don't seem to be as overwhelming...
I would encourage you to continue to express your feelings to someone you trust.
BTW - Don't worry, everyone has a hard time around parents, no matter how much we love them.