Unfortunately I don't know your name but nevertheless hi! As a physiotherapist who specializes (not in the clinical but in the business sense) on treating chronic pain and injuries, I'll answer the best I can but will have to be brief as I have no information about your medical history nor have I assessed you.
So to be brief - You're on the right track to say that an orthopedic surgeon is unlikely to help you at this stage if it is a true tennis elbow injury that you have. Tennis elbow is a condition of overuse of certain tendons in the elbow, which will heal and de-sensitize once what your body perceives as a threat is removed and the tissues are re-modeled properly.
It is common at this stage that there are both compensations in the way you use the affected upper limb and soft tissue changes around the neck, shoulder, elbow, wrist and hand that may be delaying the proper recovery of your elbow.
Before considering surgery I would recommend seeing a physiotherapist who specializes in the upper limb, a manual therapist or an osteopath (a profession I highly respect with their holistic view of the body). They would be able to give you a good idea of what you need to do.
Another thing to look out for are practitioners who have been certified in the Selective Functional Movement Assessment, Neurokinetic Therapy, or Dr Spina's Functional Range Release.
If you have anymore questions, please don't hesitate to contact us at firstname.lastname@example.org or Neeta City Medical Dental & Specialists Center in Fairfield, NSW.
Hope it helps and that you'll find the answers you're looking for!
Nathan Wong BHSc MPhty Grad. Dip. Div
Physiotherapist, Sports Trainer