Sadly I think your only options are calling or chatting MS. I've never seen it noted online.
The only place online I have seen request information is through the My Disney Experience drop downs when checking in, but those are very limited and have nothing to do with any notes you made with MS.
Any requests made online (by yourself through MDE) will show up on your check in information online.
Any requests that a CM made for you over the phone will not show up online and the only way to check is by calling.
I wouldn't be embarrassed to call if I were you. I'm sure they get these types of calls all the time.