Sounds to me kinda like a "text book" type of thing. (which is not at all demeaning to what you're going through, I am the exact same way)

Do you think there might be an element of control linked to your behavior? Sometimes painful life events can lead us (I say us because it is what I do and I feel it may connect to you as well) to seek something we can control: our bodies. Binge-purge cycles that feel like they have no end can sometimes be the result of a temporary lapse in control, followed by a frantic attempt to regain the control that was lost.

stress..pressure to be perfect..these things are never helpful for an ed of any sort. From what you have said, I gather that you are searching for options other than counseling, with that in mind I would recommend doing whatever you can to reduce the stress in your life, or at least the impact that stress has on you. I have heard a lot of people recommend yoga, personally I write, listen to music, and jog/walk to release stress. Find what works for you and go with it.

Also, based on your height and weight, your bmi is perfectly normal. So the image you are seeing in the mirrors is distorted, it's not what's really there. (but sometimes it can feel almost impossible to convince ourselves that what we see isn't real). Sometimes I try to avoid mirrors just to avoid the trigger.