My therapist wouldn't accept that. She would just want me to go to the ED or call the crisis line. She doesn't give out her email for this reason. I would try to call her though, but I wouldn't expect a call back other than "I think you need to go to the hospital" if she thought such a response was necessary.

I don't know your therapist so I'm not exactly sure what her policy on this would be though. If the crisis line told you to email her, I guess I would go for it in this situation.