Hi, I am 18 years old. I have unprotected sex and last month i was 10 days late on my period and this month i am 7 days late so far, plus my nipples have been tender, my lower right abdominal/pelvic side has been hurting, I've been nauseous, and have been feeling really drained and moody? i have takin 4 urine pregnancy test and all have been negative. What is going on with me? Am i pregnant?