you need to get your own self STD tested atleast twice a year. the #1 reason is if you start dating someone outside the hobby not to give them something, you can destroy a relationship that way.. and if you are married and your wife finds something wrong and gets tested you are screwed!
a lot of counties have done away with cheap or free STD testing due to all the cutbacks in government. plus it takes like 10 days to even get results and they keep your results on file
you can get anonymous STD testing here for under $200 which is well worth the peace of mind. if you can't afford to spend that every 6 months than you shouldn't be hobbying IMHO >> anonymous STD testing>
http://goo.gl/o1Scv6 T34TU2 saves you 10%