First off, you aren't a bad parent. As much as we like to think otherwise Cavaliers are still dogs. They will eat nasty stuff, roll in stinky stuff, and do other disgusting things just like their less civilized counterparts.
Continue to watch her. She may drink more; I know that there isn't a lot of cotton on a Q-tip but since you aren't positive how many she got then there may be more in her gut than you realize and it will make her more thirsty. (And if it took 7 or 8 Q-tips to clean out hubby's ears I'd take him in and have them flushed )
Broken record here, but call the vet. They may advice you to bulk up the dog's diet (w/bread, etc.) so that everything will pass on through better. They may tell you to just keep an eye on her until everything comes out in the end.
(And I hope you know that I'm teasing about your hubby. Mine had to have his flushed out because he had packed down all the gunk by using Q-tips.)
RIP Wallis, John Robert, Tibby & Pip
Mom to JoJo, Roxie & Linguini (Cavaliers)
and my birds Moji (Senegal) and Walter (Blue Front Amazon)