Parvo b19 reading IgG 4.8 is this a high level I have serious joint and bone pain for two weeks?

Consider this... High or not, if it is serious enough that bothers you email me for management.
IgM. The human body develops different types of antibodies. Igg is present after an exposure but does not indicate how recent the exposure was. Igm is a better indication of acute infection and in your case will be more relevant.