I'm 19 days late for my period. We have been trying to get pregnant. All pregnancy tests are negative. Went for a blood test 4 days ago. Also negative. I had really sore boobs for two weeks, and then just stopped hurting yesterday, nausea yesterday and today, constipation, and lots of burping which is unusual.i feel like I'm pregnant. Anyone end up pregnant even with negative urine and blood test this late.