Periods after pregnancy 😩

I had my son six months ago and got my period back last month (he’s EBF). I never used to have really bad PMS — some moodiness for a day, feeling like crap first day, then it was kind of fine. But now it’s like an entire WEEK event leading up to a period — cramps, moods, fatigue, the whole deal. I’m active, so it’s not lack of exercise. Is this one of the things they don’t talk about that pregnancy changes? Have any of you had a significant change like this since having a baby? Thanks ladies!