Strange breast lump?

Okay so I’m either due for a period or a positive pregnancy test, but the past few days my boobs have been super sore. Especially my right one. Upper outside of it has a large lump, not perfectly round, WITH a round lump on top of that! And it hurts like hell. Fiancé says it feels like a Nokia phone 🤨 I get lumpy breasts from time to time but not a huge one like this. Is it a pregnancy linked problem possibly? Cancer? I took a pic from google and circled right where it is. Both boob are sore to the touch near the armpits, but the one is concerning me.