Guidance for a continuing student

[Eplov]

Until recently I was a full time student at UC Davis here in California. I transferred in with a very respectable (3.7) GPA and commenced destroying my previous good work (it turns out I absolutely hate materials science). I have since left the school as a senior but with a significantly lowered GPA. My question is this: would testing through whatever classes are needed to finish my bachelors in engineering be a wise way to go and, if so, how do I begin that journey?

Thank you in advance.