I, too, had a similar problem, but mine was even more complex. Imagine being somewhat of a DL, just engaging in a bit of naughty play with them here and there, infrequently - then all of the sudden HAVING to wear them all the time for medical reasons. Super awkward. Not fun at all. It took sooo long to be able to go about my workday without feeling totally weird about it, but I'm almost completely over it.
Now for some practical advice, it's obviously better to wear a diaper and not worry about having to explain why your computer chair and floor are wet (although I have had to tell a few white lies to avoid embarrassment as well - the trick is to be cool about it). As for what specific diapers to wear, I wear Dry 24/7s frequently, as they are the most absorbent I've found and aren't very loud UNTIL they're significantly wet. A pair of jeans can conceal all that noise though. I am giving Wellness Superios a shot now for my daytime diaper, they're much thinner and even quieter than the Dry 24/7s (although I still use them for overnight and when I won't be able to or don't want to have to change for hours upon hours).
Oh, and one more tip. Your attention will become super attuned to the sound of your diaper, much more than anyone else. I'm not saying that they won't hear it, but that they won't be looking for it like you are. If they do hear it, a diaper making that noise is the last thing they'll think about. The few times when it is apparent (like walking down a quiet small hallway with a coworker at the office, etc) I'll just start whistling or humming under my breath until the hallway ends, to add something else for their attention to draw towards. Totally normal and not awkward. Or you could do like many of the others here, and just stop worrying about it - any time I feel embarrassed, I tell my self "Do diabetics feel embarrassed they have to check their blood sugar periodically or administer insulin? No!"
EDIT: I completely forgot about Molicare Super Plus! Slim and quiet, absorbs a ton, I just don't wear them because they're (currently) purple. As a girl, that may be more up your alley, heh.
