Is the pain THAT bad? Also, what are the symptoms of cts anyways? How do you know when you actually have it?
Main symptoms are numbness and muscle weakness in the hand, particularly the thumb, sometimes also the index and middle finger.
It's hard to tell if you have carpel tunnel or just a repetitive strain injury. Carpel tunnel is a result of pinching a nerve, whereas repetitive strain injury would be damage to the muscle tissue. I think generally carpel tunnel is perceived more as numbness, weakness, and inability to grasp / operate things with your fingers, whereas repetitive strain is perceived as weakness and physical pain. Either way you really need to stop playing until the pain / weakness goes away or else it's going to get worse.
BlackPanther you really should stop playing until the problem corrects itself. Also you should limit things like typing and writing, don't sleep with your wrists bent, etc. If you keep playing Smash with carpel tunnel or repetitive strain you are likely to give yourself a more serious, long-lasting injury. Just stop playing for a couple weeks (it may take even less time if the injury is minor) to a month. And after that, take it easy with how much you play. I had to stop playing for about a month due either to carpel tunnel or repetitive strain, and after that I just made sure I didn't play too much. In situations where you have to play for many hours straight (i.e., tournaments) pick up a character that's easier on the hands and play that character at least half the time.