My period last for 5 days, it came down on march 24 for 5 days and April 16 for five days. I was suppose to see my period on the 8 of May but it came exactly 28 days from my last. This period is not 5 days I'm on the 7 day and it still down. I'm not cramping but yesterday I experience Sharp shooting pains in my lower abdominal sometimes when I'm walking letting my leg up or bending down. My period is heavy still on this day. What is going on?

It might just be a heavy period. They don't always have to be the same, even though most often they likely are. If you continue to bleed for another week, sooner if it becomes quite heavy and/or you have severe pain, see your doctor. There are a number of reasons that could cause irregular bleeding.