Just follow your heart and where your passion takes you. I'm in my fourth year of college now, and I tell you, I still get confused about what my true calling in life is. I often think about shifting and choosing another degree, but it's too late for that, right? Still, life is not a race. If one can afford to pursue a second degree, then no one can stop them from chasing that alternate future they thought they wouldn't be able to achieve in the same lifetime. Just like how my High School teacher persevere to study law while teaching us, and now she's an attorney working for PAO.
Yes you're right. We need to be happy with what we do to be able to enjoy the job we have.