Is Bleeding After Menstrual Cycle Normal?

Hi, I been getting my period since I was 10 years old and it always been regular/ normal. I keep track of it as well and usually is pretty accurate about the day in which I should expect it to come again. I just recently got my period on May 29th and it last for 4 to 5 days. I woke up this morning bleeding again which I find very weird. My body is also aching.