Linda, you always have friends here!
Something you said concerns me. Your DH is isolating you from the rest of the family!? Isolation is the FIRST tactic of a bully. Now, I don't know you or your marital situation... but in general terms, if you are being isolated (and/or bullied) the best line of defense it to TALK IT UP to anyone who will listen. And I don't mean talk up your health situation, talk up the fact that you are being isolated by DH and it's compounding your health issues. Friends, Family, Doctors, etc. Let everyone know what you are being subjected to.
Meanwhile, if DH does not believe your pain... I will be happy to talk to him. I'm sure many others would talk to him too. Personally, I think he'd take it more seriously if it came from a Male member of the forum. Guys are like that.
Your Dr. should read him the riot act!