You SHOULD be nervous if you booked and did not get an email - especially if you paid anything on that booking. If it is booked with Disney, you can key in the reservation number on Disney's website and verify the information and balance since you can make payments online. If the changes were made, it should show here.
If it is NOT there, I encourage you to IMMEDIATELY call with whatever confirmation number the CM gave - as well as any notes you took (or should have taken) during that call.
SIDE NOTE: I make it a habit to have a pencil and note pad whenever I call WDW (or any business). Before I dial I write down the DATE and TIME, BUSINESS NAME, and PURPOSE of my call. When a CM answers they always give a name, so I repeat that name back to them as I write it down and I always tell them - politely - that I take notes during my calls so that 'I don't forget what I'm doing' and laugh a bit. That is true, in part, but it is also so they double check whatever they tell me. I often help friends & relatives book trips so I am held accountable for getting things done correctly!
Okay, back to my concern about your call: RE-CONFIRM that reservation and specifically request an email be sent as well. Sometimes they just mail them, but you didn't say you received a snail-mail either.
If you are told there are no notes as to any changes made, ask - politely - to speak to their supervisor. Remain patient but allow concern to show in your voice (as I'm sure it will) as you give an overview of your call and share whatever details you remember (again - good reason to take notes). You should get some assistance in taking care of the changes.
But, if that doesn't do it, ask to be transferred to Customer Service. They have one of the BEST CS systems I know of. If you have a valid concern or request, they will do their best to make it work.
Let us know how it turns out!