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.
The American Dental Association recommends that you visit your dentist at least once a year to get a routine examination and cleaning. If you have a history of periodontal disease, you should get your teeth cleaned more often in order to prevent the recurrence of infections or disease. You should also have your teeth cleaned more often if you suffer from chronic conditions such as diabetes or heart disease due to their link to dental problems.