Opana withdrawals?

[cottonfever]

ok so a few months ago i stopped my methadone maintenance that i had been doing for a little over a year. Before i was in the program i did 240-320 mg's of oxycontin a day to stay well.. i also did H for a few years before that.. really good H and <snip> worth was probably as potent as like 2 grams of what most ppl are getting up north.. long story shorter i've been seriously dependent on opiates for a while, with a very high tolerance.. Well, past 2 weeks instead of the 3-4 80mg oxys a day to stay well i've been grinding down and snorting 3 to 4 Opana Er 40 mg's to stay well... the other day i abruptly switched to Ms Contin 100's and the first day was fine. i wasnt sick or anything. The next day tho i woke up and felt like i had the flu... i was soooo sick even tho i hadnt gone but 8 hours without the 200 mg of ms contin... Has anyone experienced Opana withdrawals that stick around even through a substantial amount of another opiate??? i got over the sickness by taking 8 ms contin 100's but i cant afford to do the same thing for the next few days if that opana has me withdrawing this hard after only a couple weeks of taking it.. im hoping i just had a virus but does anyone know if i should expect the same thing tomorrow morning ?? sorry if most of this is pointless but any knowledge on my situation would make me grateful