Period under boob help

It’s been a day after my period , it was late by 2 days.

It’s been mostly a light period when am used to having a very heavy period with bad cramps and I had no cramps this time. And a lot of old blood ( brown) at the start and end of period.

But my boobs have been very sore and full and I have noticed this u dear my boob it’s so itchy red and spoty does anyone have any suggestions ??