Definitely don't feel like you are alone or that no one has been where you are. At one point, I was having horrible panic attacks, and diharrea with pain pretty much every night of my life. I couldn't be alone. I was terrified to leave my house and completely dependent on the TV. I do...still have attacks of IBS and panic from time to time. I am working on my third in a week as we speak, as its my period time and it always seems to happen then if its going to.
I have overall seen GREAT improvement. I have a life that I am happy in and do still in the back of head worry from time to time, but rarely have problems. Here are some of the things I have done that have proven to help me. To spite this list, don't stop going to your doctor in order to rule out everything you can. But all or some of these could be of great help. I will thinking of you.
First and foremost is my faith in God, HE assures we are never alone
Chiropractic-this has been huge for me. I recently stopped b/c of financial constraints and the attacks have returned a bit. It works!!!!
Exercise-a healthy core improves digestive health and function and exercise slows the tract which can help as well. It also relieves stress as well, which can trigger attacks.
A healthy intestinal friendly for you diet
Regular nights sleep
When you have pain, try a heating pad and deep breathing. They help. Also, remember there is always someone who has a lot worse than you do. Keep it in perspective. Good Luck and I wish you the very best.