Pads.
No, tampons and pads (also other menstrual products) are only needed on your period.Once your period is over you no longer use tampons or pads, in fact as your period comes to an end you need to stop using tampons because tampons cannot be used with light flow or spotting. It is a good idea to carry tampons and pads with you ready for when your next period starts, if you're young menstrual cycles can be irregular so your periods can start suddenly without warning.
One option would be to use menstrual cups. Menstrual cups are internal like tampons but safer and more hygienic so can be worn for 12 hours, including with any flow and overnight without need to alternate with pads. Cups are more comfortable than tampons or pads and don't leak like tampons or pads.
You have more options than tampons and pads, you can use menstrual cups and softcups which can be worn for up to 12 hours (tampons and pads need to be changed after 4-6 hours or sooner if full), also they don't leak so more convenient than tampons or pads. If using tampons and pads you may want to use both so that the pads can act as back-up if your tampon leaks before you can get to the bathroom. Otherwise use as you would normally and just make sure to change often so it doesn't leak.
Yes, tampons and pads are FSA (Flexible Spending Account) eligible for purchase.
To prevent blood from leaking out and staining clothes, chairs, etc....
It depends on your flow and when you'll be wearing tampons. Tampons need to be changed every 4-6 hours, remember too that you cannot wear tampons with light flow, overnight, and you need to alternate with pads.
No, pads and tampons do not contain chemicals that can potentially increase menstrual bleeding.
You should not sleep in tampons - tampons need to be changed every 4-6 hours and you need to alternate with pads to allow vaginal cleaning. If you don't have pads then use makeshift pads out of tissue or cloth folded into your underwear, and put a towel under you to be sure you don't leak on the bed.
"Always"pads and "Tampax Pearl Tampons"
No, not all girls have to wear tampons and in fact there's little reason to use tampons when there are other options like pads or menstrual cups available. Girls often use tampons because they prefer them to pads and may not know that options like cups exist and can be much better than tampons. Some people cannot use menstrual cups so will use tampons when they need internal menstrual products.
You will need: Pantiliners-For Vaginal Discharge Pads-For Your Period Tampons(if your allowed to use them) Some Feminine Wipes(optional)