My periods are slowing down, is it normal? they're on time but the flow has decreased immensely, heavy day1, light day2, gone day3 back light day4

Normal: Your periods occur because of changes in hormones within your system. While a lot of women have a period every month around the same time, there is variation from cycle to cycle. Ie – a period may come on a few days earlier or later and maybe heavier or lighter depending on the endometrium lining. It may come continuously or with intermittent spotting. These are variation of a normal process