I think you should definitely speak to your gp about it. It kind of upsets me that it embarrasses you.

What is there to be embarrassed about? You are ill, that's all.
I never once felt embarrassed when I had anorexia. Scared, alone and wishing for death to take me in my sleep, but never embarrassed. I was 15, a child, but I had the courage to speak to my gp, right before they had a chance to hospitalise me.
I hope I haven't come across as having a go, it's just I know how serious this is. Again, I don't want to scare you, just promise me you will try and speak to your gp about it, just in case it gets out of hand. Like I said before, I am not too worried about you, Ally or Munchroom because you are noticing changes and vocalising them. That is such a positive thing. I think for those reasons you are both really lucky. When I became ill, it sneaked up on me, I didn't know what was happening. It is my living hell.
Anyway, stay positive, I am proud of you both! :)
Have a good day xx