My name is Les and I am also recovering from an eating disorder called bulimia.  I understand how you are feeling and you are experiencing normal feelings.  My suggestion is that you call your sponsor everyday at the some time whether you or experiencing any negative feelings or not.  It was important for me to get used to calling my sponsor so when "those certain low spots ahead" came I was all ready used to open lines of communication with her.  It has also been my experience that my need to purge was a direct result of my need to CONTROL.  Early in my recovery, I still thought I was running the show.  I came to realize that I had not completely surrendered to the first step.  That I was powerless. You touched on this when you diagnosed that "the correct principles to practice would be acceptance and God-centeredness.  Did you think of praying????? I hope that you have found some solice in my words. Please make an effort to call your sponsor at the same time every day and let her know what is going on with you, good or bad. 

Hi, i hope you're feeling a little better now than you did when you wrote this ... maybe picking up the phone for that sponsor call would be a great idea.

Sexual issues are sometimes the most difficult to deal with ... i remember when i gave a former sponsor a copy of the SLAA text ... i can't help but think that at times that might have contributed to his issues ... he'd been sexually abused, too.

i found this time in sobriety that i could look back and see every major period of relapse i'd had could be traced back to an unhealthy and later broken sexual relationship, so i hope you can learn through this to be patient with yourself.

Acceptance and God centeredness would be a good idea just now, no matter what else you may or may not be doing in your program. i can say this for certain: no amount of shame, guilt, or beating myself up ever got me a day clean ... and at times, very small amounts of these things got me loaded.

This may be a time to walk away from sexual behavior for a time. This may also be a time to get what the big book talks about as "outside help." Whatever you choose to do, just try to remember that feelings are seldom facts, and we don't have to be slaves to them today. i'll be praying for you.