How To Cure Ankle Pain After An Injury?

hi :) the doc said i have a strained ankle but it's been a week since the injury happened and the pain is getting worse. I cannot put weight on it and i have a few red spots where the fibula bone is. Should i be using crutches? it just seems like if i don't sit down it isn't going to get better. i don't have swelling but the pain in my muscle and in my bones seems to be increasing