nexplanon & periods

ally • my bf is ugly
my period was supposed to come the same day i got the nexplanon arm implant and my doctor said i was still supposed to get my period but ... i haven't and it's been like 3 days.
also they took a urine sample a few minutes before i got the implant so do you think they would call me by now if i was pregnant ? (its the 18th and i went on the 15th)