Holy cow, Sven, I'm only just reading your post now, so I hope you are still with us! I don't know what to tell you about this, but IMHO this degree of pain seems extroadinary. I hope your dentist's office is open now and that you will please contact them immediately. Otherwise, if the pain is as bad as you say, (and why would I doubt you) see if they at least have an emergency line or on-call dentist or go to the emergency room at the hospital if you can't tolerate it. I'm wincing here thinking about your pain! A root canal is no fun, but yeesh, no one should have to bear the kind of pain that you are enduring in this day and age.
Please let us know how you are doing!