Hi. 2 years ago I tore my ACL playing football. I didn't have surgery, only about 5-6 months of physiotherapy. I started to play football again 10 months after the incident. Around 6 months later I was playing football again and injured the same knee by jumping and landing. The hospital informed me it was just sprained this time and within 6 weeks it was feeling better. I started training again 2 months after this injury. 2 months later while running at training, my knee suddenly have way from under me causing a lot of pain. Ever since this most recent injury (January 2015) my knee has felt severely week and feels like it will give way even in every day movement such as turning. My knee is constantly painful and swollen. Should I go back to the hospital and demand ACL surgery or is this normal?