Admitting that a problem exists is the first step in solving it!
If you're not sure whether you have an eating disorder, making an appointment to discuss it with your doctor should be your first step. If you need a referral, they should be able to direct you to the right professional.
Online counselling for eating disorders require a counsellor with specialised training and skills that unfortunately I do not possess. I would encourage you to consider finding an appropriate face to face counsellor as opposed to an online counsellor for an eating disorder.