Hey hun, yep there are alot of supplements you can take, I don't know them all of by hand at the moment but I can find out for you and don't worry they do not make you put on weight they just help with your systoms.
Have you told anyone that you have an eating disorder? I really think you should go and see a therapist because unlike what many people think, therapy is not about putting on weight its about helping you to find a new and more positive way to cope with life.
I am like you, sometimes in the morning I can't even get up because my arms and legs are so weak but I always seem to manage to get on with my day and usually as the day goes on I forget about it and its only when I am on my own that I remember all of the things in my body that hurt.
I have had an eating disorder for long enough now and its not fun at all, I think it is so sad that there are so many people who suffer from ed because they all must be going through hell and I would hate for anyone to have to experince that.
You do deserve so much more then to be running on a treadmill, do you ever think about where you want to go? You run but never really get anywhere, isn't that sad? Use that as a metaphor for your eating disorder. Although you run and run and run, you always end up in the same place, never really moving. Having an eating disorder, is like running, you run and run and run but in the end you don't get anywhere because you still feel like crap, you still live in hell and your weight either high or low will never be good enough, there will be always one more run to take. When do you think its time to stop running away ut instead face your fears, question who you are and what you want out of life because you could be the thinnest person alive yet still be living in hell, is that what you want?
Weight and food is not the issue, your negative thougths about yourselve, your low self esteem, your feeling of worthlessness, that is what you have to change.
When you feel lighter in your thoughts, you will feel lighter in your body but at the moment your thoughts are so heavy and so negavtive that your body reflects how you think and feel and so you think you need to lose weight.
You deserve more out of life than to be running no where, think who or what are you running from, what are you so scared of that you have to run from life?
I really feel for you because I know exactly what your going through, there is hope and you will recover, when you chose to.
I'm here anytime you need to talk.
Take care!