You are so so so not alone! I had thought I "kicked" my binge problem for good a few years ago and last night, I found myself on a mini-one (and by mini, I mean 1500 cals worth) compared to 5000 cals +. Well, that binge was not only sobering but also very humbling. And I realize how incredibly vulnerable to binging I still am after all this time.
The cause in my case is multiple things. I didn't have enough money to buy groceries until today and therefore ate snacks around the office all day. Zone bars, granola bars, chocolates, popcorn. Well, snacky food is the #1 trigger for me. Hands down. When I start with the processed/packaged snacks, no matter how "healthy," I cannot stop. The only thing I can do well with is packaged dry roasted peanuts. Everything else is a mess for me!
I binged on Zone bars, granola bars, and high fiber cereal for goodness sakes!!! This is why I do NOT buy this stuff at home. But being overly tired, having some emotional struggles, and too broke to buy food, my defenses were way way down on all fronts and all the old habits came flooding in.
Anyway, my book-long post here is all to say we all have triggers and you are not alone in this struggle. Like Skinnyelle mentioned, I am scared at the lack of control I have in binge mode. Literally yesterday, I was scared as I was shoveling food in (ended the day at 3400 cals after believing I would stop at 1900), because I couldn't stop until there was nothing else left to eat. The only reason it didn't turn into more is because I had wiped out all the snacks I brought home with me from work and the last $3 in my wallet was spent. That was the end of it.
And today, I feel hungover, mildy depressed, incredibly bloated, and (you guessed it) HUNGRY. The silver lining is I do believe we are all capable of gaining control over binging. This is a great place to start. It's really helpful for me when I start to recognize patterns that lead me to binge, as I know it's never random. Good luck. Many many hugs to you!!! Keep posting