It's a waste of time tonight!

After surfing on the Internet for a whole night,I find that I haven't done anything.Like usual,I would do exercises and memorize new words,but tonight I don't.I played basketball at 6:30.As a result that I hurt my knee,I can't run and jump as before!Because I take it seriously,I am in bad mood and become a bit frustrated.I am going to make an appointment for my private Doctor this weekend so I will know what really happens to my knee.I don't give up basketball too fast!