Period and ewcm

Usually have sore breasts a couple day leading up to AF, as soon as AF arrives they are back to normal. This time the soreness started as normal but became more intense.. 3 days into AF.. they are just as sore and my nipples can't stand to be touched! My period is so light this month ( VERY unusual, usually have heavy with massive debilitating cramps, I have pcos & endo) I would almost categorize it as spotting, but that's never happened to me so not sure if I even know what that looks like. I have also had massive amount of ewcm 2 days prior to period and all through my period ( 5 days total) which again.. has never happened, is that normal? I've also been unusually happy and giddy....nothing has changed...I'm curious ..

Anyone have any advice ?