Hi I'm 18 and been having my menstrual regular but it hasn't came this month and I usually start on the 20th I took a pt on the 21st but it came out negitive..I'm very confused my stomachs been cramping on the sides, there's been a lot of movment, and I have been having nasua but no vomit for 2 weeks already I also been craning vegitables witch I really really don't like.. am I pregnant?? I took a picture in negitive of my stomach were its been hurting and there's a curvy shadow.. soo what wrong with me??