RD,
I am sorry to hear of your sleeping trouble. This is miserable to be sure.
I am concerned about
your taking Seroquel with a benzo, as I am womdering if this combo is safe?
Please check for interactions before mixing those Rx's...or call your doctor/pharmacist for consult.
For tonight, why not try a meditation for sleep, and/or some sound wave therapy? (Binaural Beats) You can find both on youtube.
Best wishes for getting the rest you need!