Hello @franksimmons and welcome to Mayo Clinic Connect. Like @sueinmn mentioned above, it does seem right to contact your doctor for evaluation.

I found this article from the CDC which supports seeing your doctor if symptoms last longer than a few days:
https://www.cdc.gov/coronavirus/2019-ncov/vaccines/expect/after.html#
Have you had an prior joint/muscle pain or is this the first time experiencing it post-vaccine?