Well first of all, why would a doctor do a blood test that early?! A pregnancy test is accurate 2 weeks after ovulation.
If you have sex AFTER ovulation you will not get pregnant. The egg only lives for about 24 hours after it bursts forth from the ovary.
You ovulate 2 weeks BEFORE your period, also. Not 2 weeks after.
Sex after ovulation will be to late,if you want to become pregnant ideally you need intercourse up to 5 days before and day of.after ovulation is unlikely since the egg will be of no use.
are you doing it just because your wondering? that would be a bad reason. lol
You neet to use an ovulation kit to track your ovulation.
IF you have sex up to 5 days BEFORE Ovulation and 2 days AFTER then you have a %25 Chance of pregnancy.