I am very sorry for what you have been through and I am proud that you found the strength and courage to rebuild your life.
What you are feeling is not uncommon in abuse victims. If you aren't already seeing a therapist, I highly recommend that you find one to talk to to help you work through your feelings, and learn how to stop blocking out your physical and emotional pain.
Also if you havent already done so, please obtain a protection from abuse against your ex, this will protect you, if he tries to contact you again, he can be arrested and put into jail for breaking the order.
When you visit your surgeon again, explain to him everything about how you tend to block out pain, but you are feeling pain in the elbow at times, and he will re examine you. It is important for a proper diagnosis that the surgeon knows exactly where and how you hurt. If you feel akward telling your doctor all of this, is there any friends that can go with you for support?
Here is the website for domestic abuse. They have links that can direct you to information for therapists, and where to seek help.
Getting out of this relationship was the first step. Now you can get the help you need to start living your life again.
Good luck, and let me know how things are.