You can go out by yourself. You don't have to sit at home alone. Even if it is just to walk around the mall, sometimes the mere act of getting out the house puts you in such a PMA it is unbelieveable. Next Friday if you do not want to be at home, get dressed, Put on some make up and go SOMEWHERE.
I know the panicked feeling. Been there, done that. These feelings will lessen as time goes by. Patience is the key. If there is a magic bullet it is patience. That is why GALing helps. Getting out of the house helps. Not staring at four walls helps remind you that there is more to life than your sitch. But don't beat yourself up as it will all take TIME.
I understand that you felt the need to call H to talk about your S. But see if you can let some time pass before he gets back to you without calling or texting him again. In the interim, calm down. It never pays to speak to our S in these sitches when we are wound up and emotional. Let off some more steam if you have to. Be calm and collected when you do speak with him.
You will get there. Patience is the key. The more I see in my sitch and read on these boards I realize that patience will really be the thing that makes or breaks a lot of us.