aerolas darkened?!

Rachael

Okay so I've noticed and my husband noticed they have become darker. It's weird because I don't think I'm pregnant. I supposedly ovulated 2 days ago but the last time we had sex was the 10th and 11th. My last period was March 4th-7th the 8th was just the brown blood. Should I take a test or is there other reason why they have darkened?