-Glares at the other person to answer this question (meaning "j", sorry, a few other people answered while i was typing this 
)-
Aaaanyway.
It's only your third period, you won't be used to this sort of thing yet.
When you're on your period you have the whole annoying PMT thing, which just makes you feel depressed, physically heavy/no energy/etc, and annoyed, so this is a normal feeling alright?
You shouldn't worry about the leaking/spilling, use pads with "wings" as these give better protection, it'll say on the packet
"always" are good, and if you're worried just use a thicker absorbancy and wear jeans or whatever.
I wouldn't reccomend tampons yet as they can cause Toxic Shock Syndrome and if you use the wrong absorbancy they can leak, not to mention they're painful to put in when you're a virgin.
Don't worry too much though, just go to the bathroom every few hours to change it, and if you think you might be leaking a little bit you should get fair warning, although pads are designed not to leak so it's really unlikely, Just go to the bathroom and check.
With the dancing, if you really don't feel like it you could stay home and say you're sick, or just say you're shy while there? But i reccomend trying to dance, you'll have more fun and it'll help relieve the cramps too (if you get cramps, not all girls do.)
Hope i helped
)-Aaaanyway.
It's only your third period, you won't be used to this sort of thing yet.
When you're on your period you have the whole annoying PMT thing, which just makes you feel depressed, physically heavy/no energy/etc, and annoyed, so this is a normal feeling alright?
You shouldn't worry about the leaking/spilling, use pads with "wings" as these give better protection, it'll say on the packet
"always" are good, and if you're worried just use a thicker absorbancy and wear jeans or whatever. I wouldn't reccomend tampons yet as they can cause Toxic Shock Syndrome and if you use the wrong absorbancy they can leak, not to mention they're painful to put in when you're a virgin.
Don't worry too much though, just go to the bathroom every few hours to change it, and if you think you might be leaking a little bit you should get fair warning, although pads are designed not to leak so it's really unlikely, Just go to the bathroom and check.
With the dancing, if you really don't feel like it you could stay home and say you're sick, or just say you're shy while there? But i reccomend trying to dance, you'll have more fun and it'll help relieve the cramps too (if you get cramps, not all girls do.)
Hope i helped
help!