Please help with this pain relief question!?

yesterday my knee was hurting because while i was skateboarding, i fell on my knee really hard. it didint hurt the rest of the day, but this morning i woke up with my knee hurting every time i take a step. i was planning to go to the skatepark to ollie an 8 stair and 180 a 6 stair. but i dont want to be interupted by my hurting knee. is it ok to take a pain relief pill?