I could have written the OP. I am really bad for binge eating and, although I've always had the odd puking session since I was a teenager, I seem to be going through a bad patch just now. My teeth are slightly damaged but my dentist assumed it was caused by fizzy drinks; they feel very sensitive at the moment. I have IBS and that just exacerbates things because I have a real fear of the pain I get with a flare up, so I'll puke as a way of avoiding it (binges seem to bring it on - I'm always sick at Xmas, for example), as well as puking when the flare up is actually happening.
It makes me feel so stupid. I'm posting this right now because my DH just walked in on me puking in the toilet and gave me a bit of a row. As I was kneeling over the loo, I was thinking to myself: I'm an educated, sensible adult (I'm 30), I KNOW this is bad for me, I KNOW that if I want to control my weight I can (I'm a healthy weight, lower end of the healthy BMI range), so wtf am I doing? But I don't stop. I have a real thing about my teeth too, I'm a bit paranoid about keeping them nice, which makes it even more nonsensical.
I always thought it was about my weight. Years ago I was overweight and I lost a lot just through healthy (though obsessive) dieting. However, I think I'm starting to see now that it's actually a self-harm thing. I think the binge-purge cycle is a way of hurting myself. Again, it's irrational, but people do things like that when they've got problems, don't they? My extended family has recently been ripped apart because of something that happened to me a long time ago and it's been pretty traumatic. I'm happy right now, and I have a lovely, wonderful, concerned DH and a job that I'm enjoying for the first time in years, but I suppose all that stuff must be bubbling away under the surface somewhere. I don't know, I think I'm fine but then I throw up or I get a flare up or whatever and I wonder if I am.
I'm sorry OP, I'm talking about myself too much, but your post really struck a chord with me and I wanted you to know you're not alone. I suppose I should suggest counselling or something but I don't even want to do that myself. It seems very self indulgent when other people have so many more problems than me, and I feel like I should be able to sort myself out. I did go for a counselling session a few months ago on account of my family issues but it was harrowing and exhausting and I heard it gets worse before it gets better - I don't want to get worse!!
Good luck OP, I hope you get things sorted.