Yes, get it checked out. The price you pay now may help you later on in the future. I have two friends who tore their ACL's. One continued to be active on it and the other kept it safe. The one who continued to be active on it messed it up even more just by snowboarding. He hasn't repaired it and now he walks funny and he doesn't even notice it. My other friend who treated his torn ACL spent tens of thousands of dollars getting it repaired but now he's able to work out, play football, basketball and seems pretty good for the future. I'm not saying you have an ACL injury but if you let your minor injuries become great then you MAY suffer a larger consequence. Keep it safe man. If anything try to do squat exercises with light weights and do leg extensions. If that hurts then you definitely shouldn't snowboard. Good luck.