I always got Irregular periods since I was younger but as I got older they started getting regulAr I always get my period no more then 7 days this time Around its different I've had it on for 15 to 16 days and todAy I am bleading heavy and seeing clots in the toilet someone tell me is this normal?

No, since it is not what you would usually expect of your period, it is not normal. If it continues, check with your doctor as there can be a number of possible reasons for irregular bleeding.