Suggest Treatment For Sprained Ankle

Good day. Three weeks ago I sprained my ankle. I went to my doctor and x-rays were taken. Nothing is broken, but it is three weeks later and I am still walking with cruches. I still can not put any pressure on my foot and also the swelling wont go down. What can I do? Might there be something else wrong or does the fact that I'm type 2 diabetes have an influance on the healing period?