Do I have a reason to be worried about getting the swine flu shot. Conspiracy theories and health concerns.?

Well I'm 17 and my dad's trying to force me to get me to get the shot. I've already gotten the seasonal flu shot. I don't feel like I need to get it. The first day of spring is 21 days away. It will be getting warmer out. I don't feel like I need it. Then I read all the conspiracy theorist and there wacky theories. Should I be worried to get it. Do I need to get it.