The truth is doctors cannot help you with this. Sure, you can go for tests, take various antacids, and other new medications as they come out, and add one thing to another (medication-wise) in order to keep up with what would essentially become a wave of dominos falling...
Sorry to sound so grim, but as is said by those who know: if you remove the causes of ill health, you set the stage for nature to effect the 'cure'.
It's really not the mystery it is made out to be.
It is only your own efforts to undo past error (the results of which are evident
in your list of complaints) that can set in place the means to a 'cure'.
You need to alkalize the body. This can take time, and it takes commitment.
But it doesn't have to cost a lot. Not at all. You might look at Invincible's blog on curezone for some selected readings on this subject-- or look at Ask Moreless' forum, for a more indepth (but lengthy and idiosyncratic) view of it all.
You might look into slippery elm powder to help heal the leaky gut. It can do alot!
And it's simple and cheap.
The alkalizing (check the blog) will help with being able to assimilate more of the good minerals that you take in from whole foods.(I am assuming you are eating, or willing to eat, the best foods you can. And to give up pop and suchlike if this is a part of your life.)
Liver Flushing can also help tremendously, and it is not expensive.
(I got rid of a persistent and long-standing pain across the upper back with a few liver flushes, and feel an improvement in lots of nagging little complaints.)
Oil swishing also, can contribute something to speeding up the process of restoring health.
It is really far more simple than it would seem at first.
It's about removing that which is acid-waste-producing (physically, mentally, emotionally) from one's life and replacing that with what is more alkaline. ( or to be precise: alkalizing. For example, the lemon is supreme in alaklizing, yet most think it is 'acid'.)
A good standard to build into life is 80% alkaline to 20% acid. But you can "start where you are".(to quote a very compassionate teacher.) And just work toward turning things around. For most who are ill, the percentages are completely reversed. I remember being totally overwhelmed when I first started looking into taking responsibility totally (!!!) for my own health and 'retiring' the doctors I'd seen over the years. It seemed there was so much to learn!!! Too much of it was conflicting ideas and protocols as well, especially if there was a product or products to sell, that went along with this 'alternative' information...
It's taken me about three years to distill much of what I've studied-- and now I can see more clearly how simple it really is...
Andreas Moritz (archived here) has much that is useful to read.
Some resonate well with the Barefoot Herbalist's approach too...there is a lot of great proven tradition behind much of what he teaches: for example juice fasting; sitz bathing and other non-expensive methods.
and on and on.
Good luck. Remember, it's all in your hands, but you are in greater hands than that.
so, you don't have to carry a big load...Don't get overwhelmed. Start where you are...