You've found a safe, caring , and reliable support community for people battling Anxiety and Panic.. We have many members here who will be glad to lend an ear, offer information, and provide support for people who need it.
Constipation and Diarrhea are both symptoms of Anxiety.
Have you ever been in therapy. CBT is a good choice for people with Anxiety.
Cognitive-behavioral therapy is based on the idea that our thoughts cause our feelings and behaviors, not external things, like people, situations, and events. The benefit of this fact is that we can change the way we think to feel / act better even if the situation does not change. There is a free online site you may want to check out.
The MoodGym Training Program
Take care and keep posting.