Sick and still planning to train

I caught the flu a week ago and i'm dying to go back and start training again. The thing is..i still have Nasal Congestions. I have to breathe through my nose while boxing and it'll be harder for me. If my sinuses does clear up it feels different and when i breathe through it it makes my throat dry making it hurt when i swallow my saliva. I still want to go cause i miss boxing but i'm not sure if i should be going till my Nasal Congestions go away. Any suggestions? Anyone think i shouldn't be going back till i'm better?