No offense but those are terrible ideas!
If you walk around with a pacifier in your mouth she is going to freak out, and ask you why you have one, and why is it in your mouth. (ends with you having to explain your *b/dl side, and now your mom is officially freaked out.)
If you show her your diapers then she will probably freak out and ask you why you are wearing, and if you need to go to the doctors (ends with you having to explain your *b/dl side, and now your mom is officially freaked out.)
If you wet your pants she will probably not say anything the first time, but if you keep on she will take you to the doctor, he will run painful tests, and then when he finds nothing wrong with you he will probably say it is due to stress or something. You most likely will not end up with diapers either, because the last thing on a parents mind when a kid is having wetting problems is "hey! lets put him back in diapers" They are more worried about your health and well-being.
If you really want diapers, save up your pocket cash or allowance if you get some, and go buy them yourself, either online, or in a store. Even if you tell your mom it is highly doubtful she will buy you diapers, even if she is ok with it, and i can almost guarantee you she wont be.
Sorry, if i sounded too harsh!