Pregnant?

Hi girls! Well, I am 2 days late now and my hubby and I are TTC (my period generally comes with no delays and strong PMS). This AM I had a drop of brown creamy discharge when i wiped with on a off barely there lower pelvic cramps. I have tested for preg yesterday (1st day of period) and today and both were negative. I also have tender and sensitive breasts/nipples and some food aversions. Am I pregnant? When should I test again?