ok.. as some of you know ive been using opks for the last 2 months !... and i have heard from lots of women on here, that when you are pregnant, you get a + opk..... i got a positive result on the 13th or there abouts, it was negative the next day.... i mean... no line at all !!... so now im on cycle day 28.... and just out the blue i done another opk 2night, and it was positive !!! does this mean im pregnant ??? i have no preg tests in the house (24 hour tesco is looking promising !! ).... have a look please and tell me what u think !??... if im not preg, then why did i get a positive in the middle of my cycle.... then it was negative, now positive again !! .... please please look and give me some advice !!