No Period with Paragard??

I got Paragard last month (March 1) when I was on my period, (but it was a super light period) and Dr. said don't worry it was from all the poking. (1 failed attempt at IUD) 
But now it's April and I haven't gotten my period. (no sex) went to the dr. Everything is normal. But still no period. ????? Has this happened to anyone ?