First infertility appointment scheduled!

So, I have my first appointment with an infertility doctor in the books for January 7th.  I'm excited (happy?  I'm not sure the right word here) to get things started and find out what is preventing that bfp.  Had a quick question for you girls who've been there done that ... Did you abstain from sex for 24 or 48 hours before going in?  I know you should so they can get an accurate pap and all, but how long?  This early appointment is 2 days after I ovulate... I would really like to get that last day of BD in!  It was either that or wait another month - so guess I will just have to take it!