Please reply!!! #Stressed #Advice

Sierra • ♏
I been off the implanon (implant in my arm) for 6 months and got my period last month around the 17th and I tracked it on glow , and was excpecting my period 16-18th but it's the 20th and still no period . Should I be conserned? Take a test? Wait for a period to come. Is or has anyone gone through this? 😬😬😬😬😬 #stressed