Supposed to get period on the 10th? didnt..? :)?

I haven't expirenced that but I know that sore can be a sign of pregnancy. If you guys have been trying for a long time and just recently gave up then it could be very possible that you are pregnant. When you are trying and trying you tend to be more stressed and when you just kind of leave it be, your body can relax enough to get pregnant. Also very telling is that your period is late when you are usually very regular. Take a home pregnancy test and good luck!