Dangerous. Doable? Yes. Smart, no.
I'd recommend .5 kpin if you're going to do it. xanax is just too strong, you'd probably be alright, I'd personally do it, but I don't know your tolerance and how you react to those drugs.
I normally bang .5/shot, it rarely gets me nodding (never heavily) and can keep me not sick for about 12-20 hours. I was withdrawling and took 1-2mg of xanax 2-3 hours prior, finally had someone come through and banged .2-3 of some shit I'd never had before (did a test shot of 25 units, rushed crazy hard and nodded almost unconscious within 5 minutes, and decided holy shit, let's do the other 50 units) and swerved all the way to a gas station near my house where I fell asleep in my car for 5-20 minutes (not 100% sure) before one of my best friends showed up to get beer and noticed my car running and me slumped and unresponsive in the drivers seat. After loudly saying my name 2-3 times at my open window he reached in and shook me until I woke up. I was 'tired' and fell asleep while texting.
If you don't get what I'm trying to say, mixing benzos and opiates is a recipe for disaster unless you're very calculated and know what you're doing and have tried it at lower doses to understand how it will effect you.
It sounds like the dose you've taken throughout the day might be a big dose for your tolerance if you've had to do it in intervals throughout the day, but at the same time...you said throughout the day. Which means you might have last dosed 2-3 hours ago. The xanax would probably be enough to get you nodding, and while I don't want to encourage it, depending on how you've been dosing (time, amount per cwe, etc) you MAY be okay to take it.
I'd advise saving it for tomorrow and doing the xanax first followed by a very low dose of hydrocodone, and work your way up gradually.
