Three weeks ago I sprang my right- leg and knee and ever since the pain won't stop: at night i can not put one leg on top of the other one'cause i can not stand the pain;(I sleep side-ways) so I have not sleeping good either; lately the pain seems to have travel to the left leg I have massaged it with vicks, ice ointment and ben gay and put heating-pad...what is going on?? is this just artheritis..? or something worst. there is a lot of cancer in my family ..and the last of my sisters that got better I remember it all started eith a strong pain in the leg, can you please respond..? thanks a lot!!