I am hypothyroid and have taken 100mcg thyroxine per day for about 25 years. I am suffering from dreadful morning anxiety/depression, have put on a lot of weight and developed cravings and want to get my cortisol levels checked. Would it be a waste of time getting this done by the NHS? I am wondering if I should get this done privately? Can anybody suggest a good lab. to contact? I would really appreciate some advice as there seem to be so many tests to choose from.