I know just how you feel. I have been hugely unwell for the last 4 years (hospitalisation for a week every 3 months, months at a time off work, lost 10 stone in weight - looked anorexic, vomiting 6-10 times a day, horrific abdominal pain) and then I got a new Consultant, back in April. He admitted me for 10 days and started from scratch. Took me off all my meds, ordered scans, biopsies and investigations and lo and behold, found out exactly what was wrong with me! He started me on new meds and I'm a different person!
I felt like I was a shadow moving through my life, I couldn't join in with my DCs, couldn't enjoy anything, just wanted to be in bed with a hot water bottle - and now it's like I've been reborn.
Can you ask your GP or Consultant to have a review of your treatment plan? Sometimes we are so fixed at going along with what the Doctors tell us, we aren't aware that there might be other options which can make a huge difference.
With regards to your DH thinking you're faking, why not take him along to your next appointment and ask the Consultant, in front of your DH, what your DH could be doing to support you - it might make him buck up his ideas. Really good luck on feeling much better very soon xx