So i kinda have to question.

[1] im sixteen and im a m***n and decided to have unprotected sex, but i only did it for about 5 minutes. what are the odds that i am actually pregnant?

[2] if i am pregnant, im only about a week and a half along. ive had horrible headaches, ive gained weight because im constantly hungry (and i usually eat like a bird), im a a lot more tired than usual, and a couple of other ridiculous symptoms. could this all just be in my head?