Hi!
You should definitely not give up after 10 days! I have been on Epiduo (2.5 BP) for 7 weeks and am finally getting clear.. I'm not saying yours will take this long but if you stick it out, it will work! I experienced burning at first also, but now have none. If it isn't burning for you then just keep with the routine and you will get clear. Do not give up on it!
Feel free to ask me any questions you have!
-Alex
It may take up to three months of strict use before you may see really encouraging signs with The Regimen when you are following it strictly. Since you are using Duac rather than a 2.5 % bp as recommended, your progress may be different and you aren't really "on" The Regimen. When you use products other than those we recommend, we can't really predict what progress you may make.