Hormones or pregnant?

Amberly
I have the implant that goes in your arm it is getting taken out next week and November will be 3 years I've had it but I know being over weight and the length I've had it can cause it not to be as effective I have gotten my period ever month since I've had it but this month it's not its going on 3 days late.. should I take a test or not even bother?