Definitely not. Tampons really are great, especially during summer. It may take a few times before you find them comfortable, but trust me, once you get used to them, you'll never use pads again.
*Edit* Someone said to not leave your tampon in for more than 6 hours because you can get toxic shock syndrome
. This is not true. TSS is extremely rare and the back of tampon boxes say you shouldn't wear your tampon for more than 8 hours. As long as your flow isn't too heavy, you can leave them in overnight, but be sure to change it first thing in the morning.