Help!!

Hi all, I am 9 days late for my period and I sometimes go a few days over but never this long! It has been 36 days since my last period and I have sore nipples and slight cramping. I feel slight sick but it's only when I think I'm pregnant so I'm possibly just tricking myself..? I took a test 5 days ago and 2 days ago, both negative. I did pee about 6am then took the tests around 10am but I drink so much through the night and pee constantly so could I be pregnant and I'm watering my urine down? Anyone else has this situation?