Nexplanon

Everyone who has the arm implant, if you can feel the implant, do you ever question if it’s working or not? How do you get over worrying if you have a period or not. I think I’m one of the people who don’t have periods. So does that mean my uterine lining is too thin to shed, so it should be working, right. I took a test a like 3 days ago, but I think I will take another tomorrow just to be sure