The only thing I can think of off the top of my head is hormonal changes. Ever notice your gums are more sensitive around your period? I am entering menopause, and definitely notice this side effect of hormonal fluctuations.
Me... I would probably fast through, and swish my mouth with a warm saline solution. As far as hormones go, you may want to look into Liver Flushing as well, as it controls a lot of those functions.
As far as the tea, I doubt ten days of Smooth Move is going to hurt you. It is definitely not recommended to use any laxative on more than a temporary basis. If you are paranoid about the tea, you can (it is not Master-Cleanse protocol) substitute a plain water enema. Naturally, you will find lots of people who will tell you these are also harmful...
Also, you might want to pay a visit to your dentist. Ask him or her if there is anything special happening in your mouth.