I had sex on 8/16 it's now 11 days since conception. is it possible i will get accurate home pregnancy results ?

Possible: but unlikely. If you need to know sooner rather than later, it is best to have a blood beta HCG test done.

Iffy: it is a bit early to be sure, another week to be sure. That said if the test is positive now it will be accurate, but negative might not be accurate.

No: Wait until a few days after you've missed your period.

Wait...: For accuracy, it is best to wait until at least you have missed your period. Checking now MAY give you a positive result on a very sensitive test; however, if it were to be negative that wouldn't necessarily mean that you are pregnant. If it is negative when you miss your period, you should retest in a week (if your period has not yet begun).