I think an internal voice is 'normal' for ED- I've had an internal voice which 'shouts' at me occasionally since I was about 13, and I've always thought of it as part of my brain which I don't like. Mine tells me I'm selfish, greedy, stupid etc and that everything that I do wrong is because of my weight. It swears quite a lot as well and tells me I'm a "****ing stupid *****" whenever I do something wrong and sometimes I find myself whispering under my breath without realising it, eg "you're so ****ing stupid, why did you do that you fat *****?" which really isn't the sort of thing I'd usually say! It started when I was at school but has got stronger and more aggressive over the last ten years- it used to be 'hate myself' or 'you're so stupid' but now it's a lot more intense. It's never been an external voice though, and I've always identified it as part of my brain. I also have 'brain arguments' with it, sometimes out loud.

I think it would really be worth seeing a counsellor though, to help deal with it. It can be really, really hard to manage. It's good that you've got someone you can speak to, but a professional could be really helpful. Would you have to tell your father? I've seen counsellors in the past without my parents knowing, and I go to a support group atm without them being aware (I still live at home, and tell them I'm meeting a friend or going to a writing group). Really hope you can get some support :/