My Period days

Maria
Does anybody else have a period that last for 2 1/2 days to even three days? My periods are so short. I just got my period the 27th and today im basically clear ( very very light spotting) is this normal? Could this be why I'm not getting pregnant? My ovulation is normally days right after period....(which is strange) anybody have this going on with them? 
Thanks for you're help:)