if you can get in a HOT shower take it right away, sit under the shower as hot as you can stand.
Good CBD loaded Hash & Pregabalin will do well but for the pregab you need a very low tolerance, when you are dopesick 600mg will fix you up quite well but you'll NOT Be 100%.
I can relate 100%, I go from freezing cold to the point where it feels like I am being boiled alive, the anxiety is constant too, my mind goes over all kinds of stuff & when it stops doing that all I think about is getting a £10 bag of Heroin.
That is all a Junkie when sick can do, sorry to tell you this but it's the truth. You have NO WAY to escape the sickness, you can do anything in the world but it'll still jump on you in a second & smash you to pieces.
I have been where you are a million times, it's really bad & I can understand how you feel 100%
I hope you get well soon. The only escape from it is to score OR sit it out, sorry but that is the truth, NO Junkie can escape the backside of an opiate withdrawl, you pay back every single moment of pleasure in vomiting, shitting, unable to sleep, thinking of dumb stuff, time goes by SO SLOW which drives me mad, when you have only slept 7 hours in 4 days it starts to get to you.
I send you the best, I am being 100% legit I really feel for you as I KNOW from direct lived experience how bad it is.