It really depends on when you ovulate and when the egg implants, if you did in fact get pregnant. I would not go to the dr for a blood test because they are as sensitive as a medium sensitivity home test. I would suggest getting a First Response or Digital test, waiting until at least the day your period is due to test. It can take 6-12 days for implantation to happen and another 2-4 before the HCG is high enough to show positive on even a sensitive test. Most women ovulate 14 days BEFORE their next period, so at the very least if the egg implanted six days later and took two days to have high enough HCG you could test as early as 8 days past ovulation, but on the latter side if it took 12 days to implant and 4 days for the HCG to be high enough it could take up to two days after your period is due to get a positive. I hope you get the answer you are looking for!
I'm not sure exactly what you are asking but if you think you are pregnant or think their is a possiblity that you could be, the only way to know for sure is to take a test. A blood test from your doctor would be the most accurate otherwise wait until your period is due and take a urine test. Unfortunently symptoms of pregnancy are so different from person to person and so very much like an oncoming menstral cycle that there wouldn't be really any symptoms.