Period or pregnancy symptoms?

Deborah

I should be getting my period in 3 or 4 days( I’m at cycle day 28, usually get period 28-31ish days) but this week I noticed my chest has gotten fuller and bigger. My second pregnancy I did have sore breasts and this is not a normal period symptom for me. Am I thinking into this to much. At this point the dollar test said negative but it also wasn’t first morning stuff.