No pms this month

Every month for the last 5 months, I have pms from exactly 2 weeks until my period! And this month on the 29th it was 2 weeks until my period is due and Iv not had any signs of pms I normally get very sore breast, foul mood swings and bloating! I have been exsperiancing left side pains and non of the pms signs... Could this mean I am pregnant!?