While Out Trail Running I Tripped Over A Large Tree

While out trail running I tripped over a large tree root which led to falling onto another root with my knee and also managed to hit a lower rib with another root. I managed to hobble back to my vehicle that was about 1.5km away and drove the 1.5 hours to get home. I got home and my entire knee was swollen and couldn't move it at all. I then managed to take some anti-inflammatory meds and some Advil to help with swelling and pain. I did the entire RICE therapy and this morning and throughout the day it has been difficult to walk around. Just wondering if I could have damaged it and at what point should I visit medical personnel