My fiance and I don't always use birth control. I am now 6 days late (not normal) and my breasts are really sore. They usually get a little sore about a week before I start, this time the soreness started the day I was supposed to start. I took a HPT and it was negative. Yesterday I had a dr appt so I asked for a test. They did a urine test and it came back negative. How long do I wait before asking for a blood test? I don't have a regular gyn and it takes about 2 weeks to get in with my regular dr.