Mine started hurting at 5 weeks, then they started growing! Sometimes I also get these awful needle-like pains. I bought these great underwire, high impact sports bras and started wearing them 24 hours a day. This helps a lot, but sleeping on my side is still uncomfortable and I can't sleep on my stomach at all. Everyone says the soreness should be going away but there's no signs of getting better yet. Not that I'm complaining, I started out small and WOW, what a difference!