No, you're not imagining it. It's normal to question ourselves- am I really sick? Is this really a problem? Because we feel guilty, and like it's not as bad as it could be, and we're still half-way functional- but we're not, really. Even if you've just got a touch of an eating disorder, you have an eating disorder, and should seek to address it. Because it will be easier to deal with while you're still in the uneasy, treading water stage than when you're drowning.
Don't focus on diagnoses. Focus on getting yourself stable, on feeling better. Don't question the bad feelings, figure out where they are coming from, and what to do. Sure, they're not always there, so it's not always bad, but if you compare it to how you'd react if you didn't have any problems, you'll realize that they are solid enough to worry you, at least.
If seeking out a therapist might help you feel validated, then go for it. But no matter what anyone says or labels you, you deserve happiness, and you should seek it through addressing what is holding you back.