Sun, Your number one priority is you and your health. Make the appointment and get a second opinion on your foot. You do not want this to linger for it could make the condition far worse than it already is. Something is slowly down the healing process and you need to find out what it is. If they do surgery, you may be on crutches for a while and have to keep the foot elevated. I'm sure if you explained this to your supervisor, he/she would understand. Your a good worker and they will work w/you on this.
Well, I'm not the least bit surprised by his change in mood. Their moods change w/the wind. That's why it's so important not to take to heart what they say or do. One minute they are up, the next, down. Sun, he's got a lot of disgust and hatred for himself and the only way he can find just a little bit of relief is to lash out at you. You don't deserve it, but he knows that he can do this and get away w/it. For how long? Only you can determine just how much of this you can take.
He'll see daylight again, but it's going to be a while. He's been stuck for a while and now that the house has sold and you are living elsewhere, it's going to become close quarters and he just very well move out. BTW, some will threaten and never leave and others will leave at the drop of a dime. I hope and pray that the new year will bring you a much needed rest and some resolution to his problem.
Sun, please try to enjoy the weekend. I know this has been an extremely trying and stressful time for you. Please take care of your health.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.