I Sprained My Ankle Badly 7 Days Ago. The Bruising

I sprained my ankle badly 7 days ago. The bruising was initially light green, and subsided after about 48 hours. I have adhered to RICE and today, 7 days later, have black bruising around the base of my lateral foot wrapping across the top to my toes. Do you think this is normal or is it possible I have a more serious injury? I've been snow bound for the last 7 days and have yet to go to a doctor. My ankle has seemingly improved slowly everyday minus this new bruising.