Depends on where you're at in the curriculum. You're through calc 3 (or will be soon), so that's good. I would never recommend a break between calc 2 and 3. If you're anticipating some hard classes coming up, I'd either recommend a part-time schedule to focus on one or two difficult ones (for me, that'd be statics/dynamics or physics 3). If you don't anticipate needing to retain a lot of what you learn this semester, a break can be a good way to re-cage and ensure success. Then again, you will have a few months of summer break to do the same without losing an entire semester.
Nothing wrong with taking a little break. If you honestly feel you're going to school just for the sake of going, then you know you're not in it for the right reason. At our age range, we're still trying to figure out what we wanna do with our lives anyway.