I've been on Sprintec 28-day pills for about 2 and a half years now and I've noticed that I've gone from bleeding through a super plus in maybe 2-3 hours to maybe going through a lite after 6. I've also gone from 7 consecutive heavier days to maybe 4 days and 1 of those might even be just spotting. Is it normal for the pill to lighten your period that much (it's only actually been getting significantly lighter the past 2 or 3 cycles) or should I be worried there might be something going on?