Late period...

Taylor

My son is 18mos and after I had him I got the mirena IUD. I got it removed in April 2018 and once I got my period back my cycle has always been 28-30days. Before I had my son my periods were always irregular and crazy. Well, my period is 3 days late. I’ve took one test and it’s negative. It wasn’t morning pee, and it wasn’t very much anyways. Should I re test in a few days? Could my cycles be getting irregular again? Stress related? 😐😐😐