Hello and welcome – yes, definitely contact your endo with the report about these new symptoms. Hopefully, others will chime in here, but most of the cases of joint/muscle pain I’ve heard of were fairly concentrated and sustained in one area.
The anxiety should be reported as well, although if you missed some doses of the methimazole, that could definitely be a contributing factor. A dose of methimazole exits the body fairly quickly, so even missing one day of meds can have an impact.
It’s often more difficult to remember to take meds any time we are outside of our regular routine at home, so anything that you can do to provide an extra reminder is helpful – setting alarms on your phone, putting the meds by your toothbrush in one of those pill holders with days of the week, etc..
Hope that you can get some relief soon – please check back to let us know how you are doing!