Is it possible to take longer to get a positive test with a subsequent pregnancy?

Jennifer

With my first I had a faint positive 9do. This is my first month trying for number 2 and I tested negative 10dpo. First pregnancy I had crazy tender boobs and fairly constant cramping. I don't have any symptoms right now and I'm currently 12dpo. So not pregnant? Or have any of you ladies had such markedly different experiences?? At this point I'm not going to test again unless my period is a day or two late.