*hugs* I know that run down terrible, flu-symptoms, bruised body feeling very well, everyday life story for me for 5 years now. Sadly, I don't think it ever goes away
Have you looked into fibromyalgia? It's very likely you are suffering from that as well as other autoimmune disorders. You must make sure you get your ANA checked, if you test positive, your doctor should then refer you to a rheumatologist, do follow up blood work to check for specific autoantibodies as well as running a double strand DNA test.. Even though your throid levels are 'normal',
I would also ask your endocronologist to up your synthroid a bit, see if that helps, perhaps it won't mess with your thyroid levels and maybe you'll feel loads better. It takes awhile. I was in tears last night, so frustrated with my meds not working.
It's trial and error unfortunately. I hope you get some answers soon. Do you have any other symptoms that come and go? That might be useful to getting a proper diagnosis. If you get a certain ache or problem and go OH! Thats happened before, make sure you write it down so you can remember to present the info to your docs!!