change of areolas

I am very fare skinned and usually you can't even see my areolas at all I always thought this was abnormal growing up and I was embarrassed, but it turns out its not . within the last 3 days they have darkened extremely and are way larger. is this a sign of pregnancy? I'm also a day late for my period I'm planning on taking a test within the next few days if it doesn't come. I've also been experiencing other symptoms such as sleepiness, nausea, and I've been very emotional. trying not to get my hopes up