Given your description of the symptoms you're experiencing, I was expecting to learn you hadn't been put on any supplemental thyroid medication, so yes, I'd be willing to bet your medication needs to be tweaked, probably a good deal. What you're experiencing is classic for someone with a non-functioning thyroid, as I'm sure you already know, and the replacement therapy is aimed at preventing this and keeping things balanced and even. It seems not to be working.
By all means have yourself worked up with an eye toward upping the medication.
I hope this is helpful. Please follow up with us here. Good luck to you.
John Kenyon, EMT, CCT
Non-invasive cardiology tech, Emergency and Critical Care technician, Critical Incident Stress Mgmt. specialist