I don't think there is a reasonable explanation for the pain except for the fact that your brain may be causing them... and by that, I mean like, maybe you're unconsciously thinking about pain, which produces it.
I've been to several doctors and they couldn't tell me anything except for it was heartburn, which I do have.
This site supposedly has some answers for what might cause pain: http://www.anxietycentre.com/
You might to check it out. There are some features you have to pay for, so it may not answer all of your questions.
Good luck, dude!
OK, OK, I hear you. You have absolutely come to the right place because what YOU'RE talking about is the way many people here live each day, and guess what-? we're all getting better. In fact, your timely appearance here is all part of the self-therapy you are going to learn how to do.
But first, ahem, we have some formalities. Please become a member so we can PM you and you can PM us (pm = private message). There's also a profile area. You don't have to fill in any of it, but some background data would be very helpful; your age, employment, family situation and, if you'd care to, a picture. This is a way to form an identity with us.
Sooner than you think, perhaps, you will be helping other folks who come here and report the same thing you do, so by all means respond to any post where merely letting someone know you understand will be helpful.
Do some exploring. Click a member's name to see their profile, and read their posts. Get a feel for the people and the way things work.
And then! Post a notice here -or just add to this one- that let's us know you've done all that and we'll get started. OK? See you in about 15 minutes.