^ this, start low and work up though. Don't mix them with any other CNS depressants (alcohol, opioids) as this hugely increases your risk of overdosing.
if you took 3mg and got nothing maybe your pills are bunk.
If you are buying pills that do not come in a blister package then you are most likely getting ripped off, or at least being sold pills that contain random amounts of etizolam/other benzo.