My period is six days late, but my test were negative. Advice please!

I have been off birth control for three months, and my hubby and I just started trying to conceive in May. My cycle is regular, around 30 days, and I always know days before AF comes knocking. However, I have no signs of starting, and the three test I took were negative. They only symptoms I have had are skin breakouts, heavy creamy discharge, some mild cramping, and slightly tender breasts, oh, and my varicose veins are hurting on my legs. I know this could be PMS symptoms too, but has anyone tested negative after their missed period, but we're actually pregnant? Thanks for the advice!