Hi! I just had my blood test and urine test yesterday, and they all came up negative for pregnancy. Still I don't have my period, and I've been regular ever since. Is there a possibility that I am pregnant? It's already the 43rd day since the first day of my last menstrual period. On the 10th day from the day of my last menstrual cycle, I had a contact, but it was protected. I usually have a 28-31 day cycle.