If detected, there will be no significant delay in delivery time (a week tops), so you can't really count on that as a sign that something went wrong, unless you paid for express shipping.
The package will be delivered by cops to your door, your house will be searched, and you will be arrested for questioning, a criminal record opened against you, and you will be placed under house arrest, or if you have a larger amount - worse. In high likelihood, even for a couple of blotters, they WILL take this to court (the transition to this legal procedure can take a long, long time), as import is considered an offense on par with distribution.
As always, have a good lawyer's number handy, and have your house clean when expecting shipment, just in case this happens to you.
I'd also like to go against the consensus here and recommend NOT using your real name for the shipping if possible! This way you will have plausible deniability that this package is not meant for you.
My two unfortunate cents.
Peace.
You forgot to tell us why you believe they can spot LSD in tiny quantities, instead coming off like an Israeli public information broadcast