I'm 8 days late

Zenobia
I'm 8 days late ... I've taken 3 pregnancy test and they all came up negitive. But I have been having diarrhea and constipation over the last few days ... I've also been getting a little nausea in the morning.... Cravings.... And discharge ... I just want to know if I'm pregnant or if I have a health issue going on .... Please help !!!!