I have had slight cramps for about a week now and my period is due in 4 days (about 4 days, it's never exact because I have PCOS). This morning after I wiped some brown blood was on the paper.  Since then I have had some light spotting but no real flow yet (pink/brown no red). I am also super bloated, I can't even button my pants while I sit!  I so hope I am pregnant, my husband and I have been trying for 3 years!  Do you think this is implantation bleeding!?