This is not an uncommon question for newbies, so it is always a good idea to search recent threads for your topic.  Here is one such thread from just a few days ago.  In this case you could have just scrolled down 3 days.  No harm... just sayin'

Bottom line... if you are concerned, go to your doctor or a local clinic and get tested.  It is easy.  The ladies take care of themselves, and most get tested regularly.

If you are naive enough to think every provider you come across is disease free, you are just that...naive. It's not our job to protect YOU...that is YOUR job. If you plan on doing ANYTHING at all unprotected (including oral) you really can't blame anyone if you catch something.

That you are having sex with multiple partners.  Not an easy thing to do when you are married, but better than the alternative.

I have an open order at the lab for STD testing which I have done, at a minimum, every six weeks.  If anything ever comes up hot, I will get a call.  

The particular activitities you partake in are the obvious variables above and beyond the protection.  DATY and DATO (which I love to perform on a beautiful women and obviously assume that risk) and BBBJs are obviously additional risks that you choose (or not).

http://www.youtube.com/watch?v=7YFC0O393DQ