Degrees in theatre, particularly in production and administration, are always a bit of a mixed blessing: there are about as many people in the world who go "Oh, hey, she has a
degree!
" as there are who go "Pffft, he has a
degree.
" Being in the "wrong" major certainly isn't the end of the world, and don't think that it is.
I would suggest you get into volunteering for student and community theatre. This might not be the right time of the year (depending on your region, of course), but many community theatres are desperate for production and administrative support and will gladly train you for it. This allows you to build skills, develop a resume, network and begin feeling out how you might like theatre as a profession.