Does sound a lot like fibromyalgia. Don't be too scared, the fact that you have an answer will relieve some of the anxiety, and should in turn make it slightly easier to cope with. The idea that there is something progressive and nasty going on played on my mind before I was diagnosed.

There are lots of ideas out there on how to cope with fibromyalgia. For me, I found it really important to get into a healthier lifestyle, no matter how hard I found it to start with. I got exercising more, eating better (although I still need to work on that), trying to stick to a sleep pattern and just leading a more positive life. I cannot say that I'm happy, pain free and fine, but looking after my body is trying to be the priority. There are support groups out there, depending on where you live you might be able to find out, just do a search online or ask your dr if that interests you.

Diet changes can really help some people with IBS, a lot of people have intolerance related IBS, and with the guidance of a dr eliminating certain foods can help a lot. That will take patience and a lot of will power, but it is worth it!

I would personally try and stay clear of too many pain meds, because for me, they hindered me, not helped. With long term pain it can feel like the only solution, but I'd suggest trying the lifestyle changes and seeing how that goes as far as possible. Of course, this is just my personal opinion and I know that it's not always possible.