Hooped - sorry about your rough night - sounds like some meditation is in order. If you have an ipod + headphones and are not averse to it, sometimes you can download (free) from itunes some cool meditative and hypnotic type relaxation stuff. I know cas I have done it in the past.
Hallucinations, crazy thoughts, sleeplessness, all part of detox and all part of your brain chemistry trying to get drugs back in, which it is used to. Don't give in.
May I suggest you look into Dr. Gabor Mate...great book on addiction called "In the Realm of Hungry Ghosts" as well as another good read "From Death Do I Part" by Amy Lee Coy. Reading at night, listening to stuff from itunes, all combined with rest and food should help accompany you back into a good enough place to get some time under your belt and feel better.
MGF is right. We are here!