How soon before you get af are your boobs sore??

I have 8 days until my period and my boobs have been sore for a couple of days. I wanna say they don't normally get sore until like 2 or 3 days before my period. I have been sleeping a ton like all day except for when I have to go to work and a few days ago I had period like cramps. Does that sound promising that I could be pregnant?? Or is it in my head and it sounds like AF?