Replying to Would I know if I really fucked up my knee

On saturday I went skiing for the second time of the season and forgot how low my dins were on my park skis I 270ed onto this flat box perfectly and just double ejected and smashed my left knee down really hard dont really remember what exactly happend but I skied the rest of the day without to much pain but after I was done it was super bruised and pretty swollen I can still move my leg up and down without to much pain and played basketball today. I have this strange feeling in my knee and I was wondering if i Would know if it was something I should go to a Dr. about.