So when Should i take my pregnancy test???

Susan
So my period was supposed to come on the 16th, it never came,my implanon has been removed for like 6 weeks,so I am not sure if its normal,although I had a regular period after I took off my implanon, so i am still late by like a week,I took a pregnancy test from the dollar store and it says negative,what should I do?no period or signs of it yet!