Is this normal?

I've noticed about the last 4 cycles my period is a normal medium flow for 2 days and then on the 3rd it's almost non existing, just spotting and that will last maybe 2 or 3 days of literally just spotting or brownish discharge. Is that normal? My periods used to be a lot heavier, they used to be heavy flow the first day and then 3 days of medium and the last day just spotting but now it seems I just have 2 days of an actual period..... just seems weird to me. Let me know what you think.