little to no symptoms?

my periods have always been pretty regular. only had it come a day or 2 late mabie 2 or 3 times ever. ive always felt cramps coming on 2-3 days before and ALWAYS emotional before as well. well my AF is due in about 3 days yet i have no signs of my usual. i do however have back pain, bodyaches and ive been SUPER tired for at least a week now. i have no implantation bleeding and im curious does everyone have IB or is it normal to not have it and still be pregnant? im trying to figure out if my few symptoms could mean anything.