Firstly it's pregnant, not pregnate. So many people on here seem to think 'pregnate' is the correct word.
a urine test can sometimes be wrong if taken too early, or not with first morning urine, however, a blood is rarely ever wrong (only wrong if taken too early). So if you're having certain signs and a late period but the blood test came back negative then you're not pregnant. Something else is delaying your period. Your last one was 6 weeks late, so this isn't something that's never happened before. See your doctor.
Yes I took 12 pregnancy test in the beginning of my pregnancy I am now 29 weeks with a baby boy :) I mean about 12 store bought pregnancy test only 2 came back positive it was the course of about 2 months before something finally showed up I knew I was pregnant my breasts were extremely swollen and tender to the touch I went to the hospital and got a blood test nothing so that I was pregnant but here I am 29 weeks later and healthy :)