Yup, I agree with Margo. I don't know you so can't be a good judge of anything specific, but want to remind you that your symptoms are quite real and some level of anxiety in response to real symptoms is actually kind of reasonable. Of course it'll help if you have some anxiety-management strategies, but it will also help for you to get a real diagnosis.
Not to overdo the possibility of fibromyalgia, but the Mayo Clinic link below gives a good description. Note that it is considered a centrally mediated syndrome that includes a wide range of heightened body responses like irritable bowel syndrome, irritable bladder, sleep disruption, etc. And the average time to diagnosis is five years, I saw on another website. Sheesh.
Guess I'm just trying to say...it's not your fault or your flaw that you're having real symptoms. Use the best strategies for coping with the stress that you can find, but don't fault yourself for being distressed about it.
http://www.mayoclinic.com/health/fib...079/DSECTION=2
"My predominant feeling is one of gratitude. I have loved and been loved;I have been given much and I have given something in return...Above all, I have been a sentient being, a thinking animal, on this beautiful planet, and that in itself has been an enormous privilege and an adventure." O. Sacks