I have been with the same partner for 6 years and have been of Birth Control for a year because we want to have a baby soon but not really sure when. We use condoms always. However, during my last ovulation we had unprotected sex until he was about to cum and then he put on a condom, we finished the process. I normally have 28 days between each period . Now I am on day 30. No period and I might be developing a slight infection or something. I have glue like discharge, sloughing of the skin on my labia and its white. A slight itch but hardly at all. No burning or pain ever. I have taken 3 pregnancy test in the last 24 hours all negative. I have two questions could I be pregnant and still not showing on a test? And is it common to have such a long time between periods when I was so regular?