Implant birth control-removal

Have any of you girls been on the Nexplanon also known as the Implanon that goes into your arm and prevents pregnancy for up to 3 years??
 If you have, did you guys get your period back to normal or did it take a while to get back to its normal phase. The reason why I'm asking is because I got the implant removed on September 15 and after that I had light bleeding for 8 straight days and then it stopped. Last month on October 13 when I had my period it was a very light period and it lasted 
3-4 days and that's it.   I've had sex and been careful about it. My period is due today and so far nothing. I'm really worried.