Nexplanon period frequency

Okay ladies,

I got my Nexplanon IUD put in this past March (so I've had it for about 3 months). I'm having a few issues and want to see if I'm not alone. I'm finding that pretty much everytime my SO ejaculates inside of me, my period rolls around a few days later🙄 It probably wouldn't be such an issue if we didn't have such a high sex drives 😳 I'm currently starting my third period within my old "normal" cyle 😫 (my last period was 7 days ago).

Am I the only one experiencing this??

Has anyone come out the other side after giving more time??

How frequent is your period when you're "active"?