I was supposed to get my period 3-4 days ago, although my period is never a perfect 28 day cycle. Last month, I got it in 21 days. I have had sex 3 times since my last period, all times using protection. However, I got my period today, yet it is very light, almost nothing shows up in pad but there is always blood when I wipe. Could this be an early sign of pregnancy? I've had cramps and have taken Midol and they have gone away. Is this a normal period?