Are these signs of pregnancy?

Ive been fine all day, ate 2 normal meals, & drinking plenty fluids. I go to a haunted house with my family and while standing in line i got light headed, body got hot, skin felt clammy, & my forehead was pouring cold sweat. So i sat down a minute to try cooling off. Then the line started moving so i stood back up. As soon as i did i got really nausated. I bent over cause i was still really dizzy then i puked. I said i needed to sit down again so my dad walked me to a picnic table. I stayed clammy and hot for about 30min ended up puking again then my body went ice cold and my nipples were really sore. My mom asked if i am pregnant. My SO & i always use protection but now im scared one could have broke. Are these signs of pregnancy?