How do i stop sweating from my armpits?

Ok I have been noticing that i have been sweating from my armpits a lot. Im 13. I live in florida and i know its hot but i have concluded that that is not the issue because all my friends dont even sweat after gym. my shirt is drenched by the time i get home. I have tried Clinical strength deodorants from Degree Axe and old spice. I have been getting "caught" lately and its embarrassing.I used to have a jacket but it got too small so i have been trying undershirts and that doesn't work. I wake up at 6:55 A.M and i take a shower i get out at 7:20. Deodorant and everything. i get on the bus at 7:35-7:40. I get off at 8:20. Now when i put on my backpack and i take it off their is already a little bit of sweat. By the end of school I feel so uncomfortable because my shirt is soaked and its like someone just poured a bucket of water right on my shirt. The thing is though is that it doesn't smell like sweat it smells like the deodorant i have used. I really don't know what the deal is i have at least wasted 80 dollars worth on deodorants. I am in 7th grade and i have had this problem since the beginning of 7th grade but not sixth grade. Can someone please try to explain what could be wrong and how i treat it.