Do I continue the plumbing apprenticeship or go back to University to finish my degree?

I have been working for a company for 3 weeks now and the do mechanical services. I’m a plumbing apprentice/helper but not sure if this is the path for me. I am passionate about psychology and I have a 3.4 GPA at the top university in the province. While it’s nice getting paid, I’m also thinking this isn’t something I want to do forever. Should I go back to complete my degree or stick with plumbing?