I've Had A Normal Period My Entire Life, Very Regular,

I've had a normal period my entire life, very regular, usually pretty light. I am 22 years old now. This past month I've gotten my period three times in the past three weeks. One was normally when I was suppose to get it, then I got it again 4-5 days later, only had it for two days(which is normal) but not after I've already had my period and now, five days later I just started bleeding again. Should I be worried?