Have a nice and good night of sleep, wake up in the morning, inject like 4-6 UI's of HGH (empty stomach) then wait about 3-4 hours and draw blood at any lab (still on an empty stomach) and wait for results to see if you have legit stuff or not.
Only real way to know, but these days unless you spent a fortune i believe you probably have bunk shit.. I lost about 3000 dollars trying to get real hgh from many different sources and all of them were shit :/
Good luck