Hey Louie, how you doing?
If symptoms are so severe as to make CT impossible, you could do a VERY rapid taper with Codeine Phosphate if you dose it right over the withdrawal period. I used it coming off of a long-term H habit a coupla times and it made it very bearable. I dunno which opiate in your case so your timescale and mileage may vary, but I started low dose day 1, upped dose a little day 2 and again day 3 as withdrawal peaked to a max dose of 240mg / day IIRC, then cut dose hard and fast halving dose every day over days 4/5/6 aiming to be taking nothing day 7. The idea is you take just enough to cut the very worst symptoms, without dosing so high as to interfere with withdrawal or prolong the detox. Course it will inevitably slow the detox to some extent cos you're trading comfort for speed, and you're better doing it without an opiate. Be sure to CWE if you use OTC pain meds as a codeine source won't you!
Many recommend Loperamide. Never used it, meant to be excellent for relieving the worst symptoms. Possibly more so than the codeine I've just recommended. Apart from that, a long hot bath with a few drops of Lavender essential oil was a constant source of immediate relief, really eased the cramping and restless leg stuff, the lavendar oil being believe it or not a proven aid to sleep. The half hour or so relief I got was often enough to nod off when otherwise sleep would not have come. Try to eat as much as possible and be sure to keep hydrated, especially if you're strugling to keep anything in.
Congrats on your decision to stop Louie. I wish you well, in every sense of the word. Ride that shit out. It WILL pass.

From one ex-addict to a soon to be one, I wish you the absolute best of luck! Keep us updated how you're doing. If it starts feeling like it's too much and you need to bail plenty here can advise on OTC stuff that can really help moderate the worst of it without you needing to score so keep talking to us, yeah, let us know how you're doing?