Could I be pregnant?

Recently my period came early... Like 11 days after the previous one... It was very light and the "cramps" felt more like tingles.im not actively trying for a baby but I haven't been "safe" the last few times I've had sex. On the norm if the app saysy period will start the 17, by 1am on the 17th it's here and kicking my a$$. My period is supposed to start today and so far nothing... With the change in my cycle (I'm assuming that's why it came so early last time) I'm wondering what this could mean...

Help