Carry on. C++ is still widely used and THE language for certain kind of work. So it depends on what you want to do - systems programming is done in C++ or C, business and web apps tend to be done in other things.
I do strongly recommend that you explore other languages as well. Python is my second language, for example; it may give you new insights about object-oriented and functional programming and make you a better C++ programmer (and a better programmer overall).
I believe being exposed to as many languages (and, more importantly, to many different programming paradigms) will make you a better programmer overall. Take a look at Haskell, Prolog, Lisp, and an Assembler variant, at least.
