Issues with sex drive

So embarrassing to even talk about some issues but it has to deal with the medical issues I'm going through. 

Lately my sex drive has been way off...actually scratch that it's been turned off. 

Nothing has been getting me going. It can take more then 15 minutes just to get an orgasm feeling no mind actually having one. 

Even if I do get the feeling it dies down after a few mins and I'm left frustrated. 

I'm beginning to think that my body thinks I have an eating disorder and this is why it's happening. I don't I just can't keep much food down lately.  I guess there are also many other reasons but we will see...