Its possible you took too much suboxone and/or took it too early and that is adding to your discomfort. that is a really high dose of suboxone. would have recommended 2mg incriments up to 8mg and waiting to see how you feel. but youre passed that anyway. induction is critical, not just for avoiding precipitated withdrawal, but also for feeling better sooner. Just give it a few days and you should feel "normal". The hot/cold flashes and lethargy and other symptoms should subside by tuesday. please dont think the subs arent working and give up. just give it a few more days and you will see it is all good! good luck and post back what happens!
It is absolutely possible to quit heroin and keep a fulltime job with subs, I have done it several times and know plenty who have. While it is easier in a detox away from home for most, this isnt always an option. I would recommend doing the suboxone induction on the weekend and give it a day before you go back (3 day weekend is perfect). sometimes having a job and keeping busy helps some people - they cant just sit around.
if you taper the subs over a few weeks or longer, the symptoms should be fine for going to work, Ive managed before with no issues... but if you need to, maybe take a week off for when you come off subs. everyone s experience is different. however one thing is for sure, I couldnt imagine going to work while quitting dope cold turkey though.
and deathadone brings up a good point, in the US drug addiction is protected by the disability act (pretty sure its that one) and not only is your job safe but if you are actively seeking drug recovery you may even be eligible for partial or full disability benefits (so you can get money if you miss work). may want to speak to a doctor about that. it may vary by state to state as to requirements and benefits - but your job should be safe.
whenever I was in rehab - disability always paid for me missing work during the time I was there plus a week or so after I got out as long as I was still seeing a dr for recovery