I'd see another Doctor if I was you just to be sure. A few years ago I blacked out while drunk and and did something to my fibula on my ankle, at first I thought it was just sprained so i didn't see a Doctor for about 3 days but then it started to hurt even more and became bruised and swollen. I went to the doctor and got a referral to get an x-ray then i saw the Doctor again and she said you need immediate surgery which i got the next day. They put screws and plate on but still had to stay at the hospital for 5 days until i could go home. Just saying it could be something worse then what you think. I'd get an x-ray to be on the safe side