pain on side of foot

the other day I tripped in my room and my foot turned and I pulled some muscle on the side of my foot. I have been doing what I normally do…going to the gym and such but it hurts a lottt to walk. I can’t run anymore when I workout either. there is no swelling and when I looked today there seems to be a little bruising but its hard to tell. its been a week… When is it time to get checked out? or should I just purchase a foot brace?