Sorry you have mctd. It can be a difficult disease(s) to diagnose and treat. Hard to believe you have so few rheumys in your country although there is a shortage of them in the USA as well. And not too many who know how to treat auto immune diseases as most treat arthritis patients.
Methotrexate can cause lung problems in some people so I am not surprised you had problems.
I had a very extreme case and my pm was resistant to treatment. Lost 40 lbs of muscle in a week and started 2006 as a quadriplegic who could not swallow (had a feeding tube). I was also very fit and active although almost twice your age so physical conditioning does not prevent the disease. Almost died of liver failure due to the massive and rapid muscle breakdown but ivig saved my life.
Since then I have had no flares and through physical, occupational and speech therapies and also working out on my own have come back substantially. Today I can play golf, ski, practice tai chi and lead a fairly active life. Not 100% but not bad for an old guy who seemed to have no hope less than 3 years ago.
If you have not had substantial muscle wasting and your doctors can get your immune system under control physical therapy and working out on your own can restore your strength. However, it is not an easy task and will probably take several years but you have youth on your side and have been fit.
Feel free to ask questions. I don't know all the answers by any means but my case was extreme and complicated and my recovery was unprecedented.
Mixed connective tissue disease (systemic lupus, scleroderma, polymyositis), Raynauds phenomena, Hypertension, Barrett's esophagus.
Meds: prednisone 5mg, 50mg imuran, Lotrel 40/5mg, maxide 37.5/25mg, folic acid, potassium, aciphex 20mg, multi vitamins.
Maintain your optimism and you can beat the odds.
"Although the world is full of suffering, it is also full of the overcoming of it." Helen Keller