Just to make sure we are talking the same thing, Death Wobble is non recoverable, and you have to pull over, and most likely won't be able to drive the vehicle until it's fixed.
Vibrations that suck, are bad, but DW is wicked crazy.
You're definitely out of balance, and if someone put these on for you as it sounds, you should turn around and drive back in their shop and let them know. If they are experts that installed them, they should immediately get it fixed.