Hi
Sitting on a "donut" cushion for those 8 hours at work might take some of the pressure off the hemorrhoids and give you some relief...or at least not aggravate them.
Also, if you haven't tried a bidet at home (even a cheap non-electric one) to avoid the scrapping of paper when you clean might also help you heal.
Just a few thoughts...hope you can get it resolved. It sounds like a miserable situation.