Darkening areolas in early pregnancy?

I'm 4 days away from period start. And we have been trying to concieve for awhile we have made sure to track ovulation and everything and am pretty sure I'll get a bfp! And no AF. My breasts aren't sore they are just feeling heavy. But my areolas seem to be darling around the outer circle and getting a few little bumps on them but I don't know if I'm just hoping or if im actually see this?

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