Nmbness in the knee after falling. Reason?

Hello, about 6 months ago i fell pretty hard on the inside of my right knee . it hurt for a week or so but the pain faded into a numbness at the top of my knee cap and then the numbness went away. What Im experiencing now is when I run or tap my heel on the ground with some force, I can feel that numbness return briefly when I make impact with the ground. I think this numbness is coming from the inside of my right knee ( medial meniscus ) and I wanted to make sure that this was not something that was going to come back and haunt me when I go on a 4 week ski trip this winter. Is this a sign that my knee will blow out? Im not noticing any pain but a few weeks ago when I was exercicing my right knee became very irritated (the skin was very sensative). Any advice would be welcome! thank you very much.