Could Severe Pain In Knee Be Due To MCL Tear?

I had a accident March 2014 hit my knee on a metal pole my knee has been hurting so bad I did rehab that didn t work I was in more pain when I came from rehab my knee gives out a lot I wear a knee brace and I can not take the pain right now I don t know if it is a mcl tear or mecius but the pain is on the left knee on the inside and is hurting so bad right now I feel like crying