Boobs... TMI?!

So AF is due a week from tomorrow. 
When I got into bed last night I glanced down at my boobs. My nipples, not my areoles, are way darker. My nipples always have a secretion of clear/milky while discharge. But it's even more now. Anyone have any idea if this is related to my period coming in a week or something more?? Thanks in advance ladies!! :) 

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