Welcome to this forum
It is possible that either dose of cyomel was more or you are more sensitive to this thyroid hormone replacement
which may cause rapid heart rate
and increased blood pressure.
That means it is exaggerated response of cytomel
,once you stop and take metaprolol your symptoms should subside.
Now thyroid hormone is out of your system bodyache may be there as it is short acting replacement and localized swelling may be due to local pathology otherwise low thyroid causes generalized swelling.
If problem is more you can always seek treatment before schedule visit.
You can take simple analgesic
to help pain but once you test for Free T3 and Free T4 and TSH and visit your Physician thyroid replacement would be required may be in less dose.
Good Luck to you