Giving PTU to an already hypothyroid patient (making them even more hypothyroid) makes no sense. In America, doctors get sued for doing the exact opposite of what needs to be done. Yes, the PTU (and worsened hypothyroidism) could cause all those symptoms (fatigue, joint pain, sleep disruption, back ache, brain fog, etc.).
You may be undermedicated. Without establishing a doctor-patient relationship, it is hard to say if this is your main problem, or if there is something else going on. I do have Canadian patients that see me here in Florida (especially in winter time), to get their care on the right track. Follow-up visits can be done by telephone, and for those patients that have a GP who is willing to follow my lead, they can get most of their follow-up,care from them, coming back to see me only if their symptoms worsen again.
It might be worth your while to find a doctor who will fix you completely, even if you have to travel to see them.
Mary Shomon, a patient advocate has written a book specifically about thyroid and diet, admittedly focused on helping overweight patients drop extra pounds safely without adversely affecting the thyroid. The key thing about diet, if one is going to eat "goitrogenic foods", which are those the decrease iodine absorption/utilization by the body, one needs to add extra iodine to the diet as either seaweed, salt-water seafood, animals/birds that eat salt-water seafood, or as a pill from the vitamin store.
Thankyou for your response . I am still amidst the financial ruins of losing my job during ptu treatment , otherwise would certainly arrange treatment out of country . Do you reccommend any books on hypothyroid care and diet ?