Will a pregnancy test be accurate 17 days after sex i have nexplanon but not sure if its working?

Nexplanon ?'s: Nexplanon is a progestin inplant, and will provide variability in predictability of periods, but is close to oral contraceptives for prevention of pregnancy, nearly 96-98 %. If ovulation has ocurred, a home test is accurate about 14 days after ovulation. The problem is that Nexplanon can inhibit ovulation onset, so a negative test just assures the absence of pregnancy at that time.