Welcome to our forum!
I totally agree with the excellent advice already posted for you! Incon is not to be "just accepted" unless and until there is no hope....then a diaper offers a way to get on with your life.
Please peruse a sucess story here with Sociology Geek. Well worth the time to go back thru his posts on this forum.....especially when he was near the end of his rope and about to embrace diapers as the only way to get on with his life.
I still understand you don't want to be embarassed with wet pants. Urge incon requires you to wear something "just in case" you can't make it to the bathroom. I would think a good pull on would work well, would not be noticeable under your school uniform and give you peace of mind protection. But get a good pull on....by going on line. The "underwear" found crowding the incontinent isle in pharmacies are generally pretty bad and can leak with a single wetting accident.
Check out
www.xpmedical.com for their "underwear" products. Even try a sample pack if available to see what will work for you while disappearing under your pants. They allow the best access for using a toilet when you can, along with dependable absorbancy / protection for when you can't make it.
JoeK