Hello, Thanks for posting your query. The pain medicines usually are bad for stomach but hydrocodone and Soma are safest. If still pain is troubling you then you may need neuropathic pain reliever medicines as add on the regimen your local clinician will know. There are many equipped centers around your location, you can approach nearest one and present your issue for pain management. Xanax and Ambien both are good sleep inducing medicines but there is no rationale to use both rather I would suggest use one medicine and try it s higher doses rather than making the things unduly complex. I hope this answers your query. In case you have any follow up queries or doubts, you can forward them for me, and I shall be glad to help you. Please accept my answer in case you do not have further queries. Wishing you good health.