I slipped and fell on my left knee in the garage, so I hit concrete flooring. It never did bruise but it is unbelievably sore to the touch. Getting on my hands and knees to do some cleaning it brought tears to my eyes. I can t even climb into a soft bed. I am pretty stoic where pain is concerned but this is really unpleasant. About how long does something like this take to heal. I am 65. Thank you, Marta