Squeakniss

I also had this problem when I was in High School.
I was so self-conscious.
Until one day I looked around my classroom, and realized that I was not the only one sweating my pits off in math class (I live in Hawai'i. Yaaaayyy public schools and high electricity prices). So i became a little more okay with it.
Then one day I realized my clothes were starting to stink! I was so annoyed with the stench! The sweat i could live with, but the scent was SO bad. Plus, my clothes started to yellow!
THEN I talked to a costume designer for a community theatre program, and she recommended using a deodorant that was NOT an antiperspirant. (She has to wash the costumes after every play. I like to think she knows her stuff when it comes to clothing care) I went to Walmart and scoured the deodorant isle, and realized that you can only get only men's deodorant that doesn't contain an antiperspirant. It took a couple weeks for my body to adjust to it, so i had to keep it on hand for a while. But i find that my clothes don't smell near as bad (They do a little, but only if you put your nose right into the pit of a clean shirt. Used to be that i could smell it from my closet), AND I sweat less! Bonus!
 
If you think about it logically, an antiperspirant blocks the sweat pores in your pits. But sweat is a natural thing for humans. So why fight it, you know? I think that blocking it causes more problems, including more sweat. And if you have ever looked at the thing that they put in antiperspirants, it might freak you out. Why is there active ingredients in deodorant? It just sounds bad.
 
CONS.
-I have to switch deodorants every other month (or so) cause my body gets too used to it. But i find I can just switch between two or three. Less waste!
-There are only a few deodorants that don't smell overly manly.
 
Good luck to ya!
Keep in mind that all humans are different, so this might not work for everyone.
Sorry for the long post!