Lack of Bleeding?

Olivia

So I got a kyleena for the first time after having had skyla before. All is well and good, but I haven't had my period since I got it, and I've been having unprotected sex with my boyfriend, but with no "finishing". So I'm just getting nervous, and I wanted to know if this was pretty normal? Maybe during to change in hormones? Should I take a test? Or is it unlikely I'm pregnant?