skyla iud inserted for two years, period is 5 days late???

Hi everyone, so I got my skyla inserted about a year and a half ago and I am 5 days late.  I don't feel much besides the usual PMS symptoms and I had some nausea the other morning.  Other than that I am fine, I am going to test tomorrow morning.  Hopefully 5 days after my missed period will give me an accurate result. Do you guys think it's possible? My SO and I had sex during my fertile times of the month and on ovulation day (Valentine's day..) yikes. Let me know what you all think. Trying not to stress. Thank you all!