Hi Michelle and Welcome-
Sorry to hear about your husband. This has got to be hard for you grieving and all the physical pain and IBS. I am 52 and on my own also with my 17 yr. old son. As tough as it is raising a child on your own- I have learned that we have each other, and that we make it no matter what happens.
Sherrine/Chutz has offered some great advice and I hope you can find a Dr. that understands fibro and the many other symptoms that come with it and can get you some relief. In the meantime, we are here for support!
Nice to meet you!