That's true about a lot of bulimics being overweight or obese. Many people just don't know about it because they just think that this kind of thing would produce skinny women. Boy are people stupid. It's very hard to detect bulimia because it can be much more deceptive than annorexia nervosa. I think it would be a good idea to go and get some help from the clinic that your doc suggested- just to help yourself. It just might be able to give you a better quality of life than you may be experiencing at the mo. Do you experience any of the symptoms like dizziness??? if i may ask. I think that getting help and addressing the issue would be a very smart thing to do! No-one will laugh at you because all the people feel exactly the same about themselves mostly. All the people at the clinics are there for the same thing and that is to get better. You may find that it is an extremely supportive environment- therapy groups and the like do seem to me to be this way. I dunno- you could just try it. Just maybe give it a chance and if it's crap then don't go back- but this problem seems to have been going on for quite a while for you so it may be best if you seek some councel.
I wish you the best of luck!
-Sezzie-