I'm not late yet but my breast hurt and I feel sick could I be pregnant?

my period started on the first and my husband and I had a romantic get away on the 11, 12 and 13th is it possible I could be pregnant? I've been getting nauseous late in the afternoon and my breast hurt and feel hard by the time I take my bra off.In the morning my breast feel ok again. And I feel emotional. so could this be I'm PG or have PMS. MY husband and I have been trying for some time now to have a baby so I'm praying I'm pregnant