a doctor could only really tell you to go to a PT for rehab.
swing your arm in large circles in both directions with the shoulder being the piviot point. this will allow the rest of the arm to experience better blood flow and be somewhat relaxed. rub the shit out of the lateral epicondyle area to flush the tissue and make it warm.
on your elbow, find the lateral epicondyle (the point where the common tendon attaches and it should have screaming pain) and find the most painful spot. (it will be different every day by a small amount) find the direction that causes the most pain to the pain spot and use "cross fiber friction" to help with the realigning of the scar tissue. (again, the painful direction will change daily)
now you need to do the tendon rehab excercises. start with a pound or so, and o 3 sets of 10, extension of the wrist at the forearm. gradually increase weight as you are able to.
flush the elbow again, realign the scar tissue once more with cross fiber friction, then ice the epicondyle till it is numb. ice is key, as realigning the scar tissue is viewed by the body as trauma. trauma calls for repair, but the ice will stop the hystamine response and the fibroclasts will not be sent out. everyday for 2-3 weeks and you will be better. 3 times a week works, 5 times is better.
have fun. and yes, i do have experience with this, both having dealt with medial and lateral epicondylitis in myself, and working in rehab some years back.
best of luck to you on achieving a pain free body.
edit: it would not hurt to take an envelope of knoxx unflavored geletain in juice every day during rehab. if you got it from an armbar, (red flag) your tendons might be in need of some nutritional fortification. take fish oil too.