What does this mean?!?! Please answer?!?!??!?!?!??!?

was at church with my friend Kaitlyn and I started sweating a bunch. Then my vision started going black around the edges and I was getting super creeped out!! and then it went all black, i felt like i was going to pass out and then my stomach started hurting a bunch!! I held on the pew and my vision started going back a tiny bit i felt around and lightly tapped Kaitlyn and told her i thought i was going to throw up. She told her mom and we rushed to the bathroom. My vision came back while i was sitting at the toilet. I feel better now, but i don't know why this happened. Please help?