Symptoms shifting to after period?

Normally the worst of it for me is anywhere in that two weeks leading up, but the past few months I've noticed that things seem to have changed to "a little weird around ovulation but mostly OK, and then I get crazy a couple of days after the period finishes". I've been getting huge random more swings, especially anger bursts, and that's really worrying considering I used to have extremely explosive anger episodes and meltdowns that really trashed my relationship... Should I be worried that it's changing? I'm scared.