PMS or Pregnancy?

I currently have a 9 month old and am still breastfeeding. My periods have been pretty regular since they returned at 5 months postpartum, but currently my period is 10 days late. The last week I have had pms symptoms like mood swings, minor cramping, increased appetite, and breakouts. Still no sign of my period.

Is this pretty normal while breastfeeding or should I take a pregnancy test? We are NOT actively trying for another baby and use condoms for BC.