no, that would be too early for even a blood test, beacuse you actually wouldn't yet be pregnant.
your body does not make hcg (pregnancy hormone) until the embryo implants which is typically about 10 days after conception.

if you knew you had to have the bone scan, it would have been sensible to avoid trying to get pregnant for that month.

now, the only thing you can do is wait an see if your period turns up. If it doesn't take a test.
if the test is positive, speak to your doctor about the possible effects on the fetus from the scan.

if it is negative wait a week and test again if your period still doesn't show.
If that is also negative, then you'll need to get checked out by your ob/gyn/doctor.

I agree with Kia.
Hope everything turns out good.