Period Consistency?

So I used to have my period for only 2-4 days and it was very light and it would come without knowing, like random times of the month each month. Now I am having my period for 5-8 days and its is heavier and a totally different consistency, like its a snot consistency. Idk if something is wrong or what. I might just be maturing, but I'm not sure if I should be worried.