you should probably carry :
Tampons
towels
a plastic bag
paracetemol
sanitizer
clean knickers
A backpack laptop carrier should probably be used if you carry your laptop frequently for less hassel and the ability to have an extra free hand.
A flute is a wind instument, a cello is a string instrument. You can carry a flute, in its case, in a backpack. You need a car, or truck , to carry a Cello
Apart from the hard case the instrument comes in - you can purchase what is known as a "gig bag", which is made out of lightweight material with a straps fitted so as to carry it around as you would a backpack.
What are you wearing? - What do you wear? or What are you carrying? - What do you carry?
Sounds like your going to get it soon. But you can have PMS for anything like 5 years before you actually get your period, so you may not get it soon, but you should be ready in case you do. So always have tampons/pads on you, in your backpack or such.
No spotting only period is not normal. You should consult you gynae for such case.
There's no reason why 10-16 yea olds should carry tampons - in fact at this age tampons aren't recommended, and certainly not for the first few periods. Girls of this age should carry menstrual products with them in case their periods start, as they can be irregular at first they don't know when their periods may start. It's also a good idea to carry supplies with you to help your friends out too.
So that your breath smells nice in case you kiss :)
Most girls get their period around the same time their mother does. You may also find a small amount of clear to white discharge on your underwear about six months before your period. When you hit puberty you should probably start carrying pads around in your backpack or in your bag for summer camp in case you get it unexpectedly. No worries, when it comes it will come just like everyone else.
No, but you should invest in a sleeve.
Not usually. You should do reactions with a lab partner in case of emergency.
It depends on the airline carrier. Not on a carry on USUALLY but sometimes you can.Answeron southwest you can Absolutely NOT, it is too big to fit on the overhead compartment, so they will not allow you to. You can put it with your other luggages though.