That's not good at all. I'm sure it feels enough but that's just the disorder trying to convince you of what it wants. Your body has likely given up on crying for nourishment at this point but you really need to give it something substantial to work with.
With just coffee & tea your organs, especially your filtration organs, are going to shut down. You'll end up in a state of ketosis (if you aren't already) and your cognitive functions will decline as your body starts to feed itself on the muscle & fat in your brain. Your heart is a muscle and will begin to have problems.
Did you notice how I said that your body would start to eat its own muscle? Don't listen to the disorder! It'll keep telling you how fat you are when there is in fact no fat left to metabolize.
I don't know what kind of state you're in right now but it doesn't sound like you're doing very well and really need some type of intervention. Please, tell someone about this and be honest about how hard you're finding it. The damage anorexia can do takes a very long time to heal if you let it get too bad.