What we're you're early pregnancy symptoms???

Michelle • ♡♡ college student, Vet Technician loving life, Sean Burgett is the love of my life ♡♡
Is sensitive nipples early sign of pregnancy??? I am over a week late on my period, no sign of cramps or little bleeding.. took 3 pregnancy test first was positive and the last to were negative (so confused).. I have nausea and dizziness also my nipples are very sensitive. What are you're symptoms??? What should I do????