You should be ok.
As Caregiver222 mentioned, try icing the site. Also, you can take an oral OTC NSAID, i.e. Motrin. Solu-Medrol is viscous and can cause this kind of local reaction.
If it does not resolve in 5 days, I would have a physician assess it.
Good luck with Nursing School; I have been an RN for 12-13 years.
Yeah. You'll be O.K..
There is nothing specific to take. Cold compresses will help.
There is a remote chance of infection, so watch it over the next few days for signs of redness.