A diet largely consisting of squid doesn't do much for the state of your digestive system or your breath, you really don't want to be breathed on by an elephant seal. Most of the time pods are quite fairly restful places in a constant snoring and guttural grumbling sort of way, but every now and then one of the inner most seals decides it wants to go to sea.
I have never had the severe symptoms you describe after a cleaning, that's quite a reaction, but have felt very tired. I chalked it up to emotional exhaustion as I hate having my teeth cleaned. I agree with Wayne Mikie, it feels good to see your name. Hope you are feeling better.
It's common knowledge for most people to brush after meals; however, to keep your teeth at their healthiest, it is far better to brush your teeth before eating rather than after in many cases. Anytime you eat or drink anything that is sugary, the bacteria in your mouth feed on these sugars to make acids. These bacterial acids cause the overall pH in your mouth to drop below normal levels and make your tooth enamel softer and more vulnerable to abrasion.