Your tongue will probably be fine! I agree with Camille79 about some discharge being normal and seeing your piercer to reassure you, and as kaktus says, if you are worried that it is infected then go to your GP (but expect a lecture!)
Keep up with the salt water rinses everytime you eat or drink anything that isn't water, and maybe do them a bit more frequently if you're worried. What mouthwash are you using? Some (such as Listerine) are a bit too strong to be using on new tongue piercings, try something like Betadine mouthwash for sore throats/mouth infections, you add water to it so it's quite mild, but it's still antiseptic, antiviral and antifungal. (It tastes awful though!)