I am 4 days late for my period tomorrow makes 5. I took a test a few days ago and got BFN and then again today and got BFN. My boobs are sensitive only around the nipple (but not bad), I'm having mild cramps in my lower abdomen and back aches. I'm usually spot on with my period start day. We had sex several times during my fertile week and the day before ovulation specifically. Could I be pregnant and what should I do next....take another test in the morning or wait? Should I schedule something with my doctor and when? I'm nervous and anxious....