I sprained my thumb 7 wks ago today. It bent backwards almost like a rubber chicken neck would.?

I wore a cast splint on it for 5 wks. I still can not use it. It has pain and it feels floppy at times. The joint at the base looks bigger somewhat when compared to the other hand. The injury is on my right. Should I return to the Dr., or specialist to be re-evaluated? Or will it heal on it's own?