How long did it take you for a BFP ? I got a BFN and then a VERY slight BFP ?!?

Last period was 12/23/09 and my cycle is very normal (always 28-30 days). Did "it" 1/2,1/6, and 1/8 w/hubbby. Took two tests today and one was BFN and another was with a very very very very slight line ( BFP?). I think I am at 12, 13, or 14 DPO ....help!? Going nuts here and want to know...