My Period Keeps Coming Early???

So my last 3 periods have come about 2 weeks early. I stopped bleeding 13 days ago, & now I’m bleeding again. My mom, maternal grandmother, & paternal grandmother have all had problems pertaining to their uterus, & have all had hysterectomies. My mom had endometriosis, I’m not 100% what exactly the problems were with my grandmother. I’ll be 29 years old next month, & I have always had a very regular period. 28 day cycle, always came exactly when predicted. I’ve had 3 children, & with my first pregnancy, I knew before even taking a test, because I was a day late. Took it that day & it was positive. Should I be concerned? I don’t have a doctor right now, but I’m definitely looking for one.