Weird, Phang Nga is usually pretty chilled. What kind of visa did you enter Thailand with (if any). Any chance you could post a redacted picture of this Stamp? Thanks
If you havent been scuba diving, then now is the time,,,, get your certification then jump on a Liveaboard to the Similan and Surin islands.. very few boats out there at the moment and you will have dive sites where you're going to be the only boat there... prices are good now also. PM me if you want to know more.