Suggest Remedy For Pain In Knee After Knee Injury

I have a knee injury while playing soccer and am not sure if it is a meniscus tear. The pain is terrible right after a match, but subsequently in days it gets bearable. Because I'm hypermobile, I'm normally able to bend both knees backward beyond the normal range without pain. However, I'm unable to do this with the injured right knee. Yet straightening it to the normal range causes no pain.