Late Period with IUD month 2

So my paragard was inserted December 2 and I had my first period with it two days after getting it and then my second period lasted 10 days and came early. According to my period apps (one that I started charging before paragard and one I started years ago) I am 1-3 days late for my period. Is this normal? I am kind of freaking out because I had sex during ovulation and before my period always came on time. Any advice??