Pregnant or not

So I’m 8 days away from my period we have been trying for a baby. These pass three days I have been super nervous. Super bad diarrhea and feeling so tired. I get so sick but so hungry it’s like my body can’t make up its mind. I try to eat but I’m so nauseous that nothing sounds good. I’m just lost if this is early pregnancy or if it could be my period maybe. I never had this happen before.