Several of our members have undergone some sort of surgical intervention. And there have been a couple threads devoted to that topic. You might try using the search feature to dig them up again. I think it is an important topic for many, and the shared experiences in these threads are very helpful for many in knowing that you are not alone.
You are very wise to agree to participate in therapy. I have a coworker who had surgery several years ago and refused therapy. In my opinion it wasn't a good decision as she continues to struggle with a number of emotional issues including continued poor eating habits that have resulted in some serious secondary health problems.
Best of luck to you and remember we are here for you. Since this is all anonymous, and a judgement-free-zone, lots of us feel free to express outselve here in ways we can't among our family and friends.
Keep us posted on your progress, we are in your corner