If your “chiropractor” is in Pattaya, he is probably unlicensed. Having said that, when both shoulders are affected with a non traumatic cause (accident/fall or overuse- wt lifting) then it can often be traced to a bad cervical disc. Did anyone check your arm reflexes or strength? You can get more info with neck x-rays to see if there are any red flags of degeneration. If so, a MRI might be necessary for confirmation. Once that info is attained, then a proper regime of care can be structured.