IRREGULAR PERIODS

I'M 30 YEARS OLD AND I HAVE ALWAYS HAD NORMAL PERIODS BEFORE I HAD MY SECOND CHILD WHICH WAS 3 YEARS AGO. NOW I USUALLY START WHEN I'M SUPPOSE TO AND I WILL BLEED FOR ABOUT 3 DAYS AND STOP AND ABOUT 4 DAYS AFTER I STOP I WILL START TO BLEED AGAIN. I'M ALSO VERY MOODY NOW AND I JUST DON'T HAVE MUCH ENERGY. PLEASE HELP ME! SHOULD I SEE MY OBGYN OR IS THIS NORMAL? THANKS TINA Tweet