Weird period...Help!

Ok so my periods are usually 5-6 days long...I just finished my period yesterday but it was very odd! I usually have cramps the first day for a short time if I take medicine for them and I had none. Also it was very light which normally its heavy on the second day. It only lasted for about 4 days and I thought I was done because the fifth day I had nothing! But then yesterday the 6th day there was a good amount of discharge this is all very abnormal for me! Not sure what it means or if it's normal. Could I be pregnant? Help! :-)