Just a quick side note: the 500mg or 650mg you were talking about in the Vicodin was the acetaminophen part of the pill. Vicodin is usually either 5/500 or 7.5/650. That means there is 5mg hydrocodone/500mg tylenol or 7.5mg hydrocodone/650mg tylenol. Percocet is 5/325 (5mg oxycodone/325mg tylenol). Tylenol is awful for your liver, and can cause problems with addicts. You are only supposed to take max 4,000mg tylenol in a day. That's 12 Percocet, 6 Darvocet or 8 Vicodin. My addict boyfriend's DOC was painkillers during his active addiction, and I know he was taking more than that in one sitting sometimes. When he went into detox, his liver enzymes were WAY elevated. Hopefully they will come down after awhile of not using. The liver does repair itself pretty well, but you still need to be careful.
Anyways, I am just a nurse so I can't give any real medical advice on your symptoms. Headaches sound like they might be rebound headaches after taking so many painkillers. If so, they should go away after awhile of not using. I would try not to take anything at all for them. Drink lots of water. With the benzodiazepines, since you weren't a long term user and apparently haven't used for awhile, you should be OK. Long term or real high dosage use should be tapered down under the supervision of a doctor.
Again, please don't take this as any kind of medical advice. Call a doctor if you have any concerns.
, Vanessa