I'm 17 and had sex in January. Not exactly sure what day but its Feb 13th and I've been gassy for a couple of weeks and have a bit of constipation, i also seem bloated and can barely suck my stomach in :( and also i had unprotected sex and it was my first time and also my boyfriends which is younger than me. (He's 16) We're both really terrified. and my stomach has been hurting a bit but no headaches nor morning sickness only tiredness.