Could I be pregnant?

My S.O and I have been trying to get pregnant. We had sex the week I was supposed to Be fertile.

I’ve been dizzy, nauseous, my boobs have been hurting and feel a bit hard at times. I’ve also had cravings as well as dislike to some foods.

Could it just be me PMS or could I be pregnant? I’m so anxious to see if AF comes or not. I’m supposed to start tomorrow. I took a pregnancy test on Wednesday came back negative. I took one today as well and came back negative? Could I have tested early?