Boob pain help🤦‍♀️

Can someone who has been pregnant before explain their boob pain to me before their bfp?🤦‍♀️

I had two chemical pregnancies and both times my boobs didn’t hurt at all in TWW, which was unusual since they almost always hurt before my period.

Now every time my boobs hurt during TWW, I’m convinced I’m out because of how they were the first two times. Can anyone explain the difference in pain and/or timing with sore boobs in their TWW when they got a bfp versus their period??