Knee ligament injury. Back to square 1!

My left knee ligament was injured while playing football 1.5 years ago. It had made a loud popping sound which even my friends heard. So I had consulted a doctor and he removed the mucus and blood from the knee by a syringe and the swelling had reduced. I had been given a brace and was walking on crutches. So after a few days my knee was better and I was able to walk, so I started exercising and making it stronger. Wearing a brace, applying ice and pressure, and effective exercise But I knew my knee was not stable like it was before. I had full trust that if I made a sudden turn at a particular direction I would lose it again. So months passed and I did play football quite a few times. Got injured while playing football, while travelling and often heard that popping sound, but I knew how I could recover and kept doing that. But now I'm really sick and tired of this. I don't play football anymore. I lost balance at home and am in bed while I'm writing this. it feels I'm back to square 1