Totally different flow

I've been on birth control pills for almost ten years and this is my first month off of it as my fiancé and I are getting married in October and wanna try for a baby right away but when I was on the pill my period was very light and started on Wednesday and ended on Saturday and was dark brown/red and thick and now that I'm not on the pill it didn't start until Friday (30 days after the start of my last period) and is a very heavy flow that is more bright red and true blood like, is this drastic change normal?