who do i/my clothes smell bad at school?

[Joe A]

i haven't had a problem with body odor up until these past few months, and its embarrassing having others avoid you and talk behind your back. just last year people always complimented me on a good smell (used lacoste cologne). at first i thought it was just a "fluke" or something because i obviously hadn't experienced it before, but it continues everyday. i shower twice a day, brush my teeth two-three times a day, have tried 3 different deodorants/antiperspirants, lotions, shampoos, body washes, different cologne, febreze, etc.etc. at the beginning of the day before i go to school i smell fine (me and my clothes), but right when i get to school, it starts to go off - maybe it has to do with likke.. hidden glands? cause i've started to feel like this, pressure within my body that seems to be releasing some sort of "energy/sweat" but im not a person who actually has sweat running down my body after sports so... yeah... its confusing. worst part is, my nose has literally become immune to the bad smell so its harder for me to tell if im smelling or not unless i see reactions/hear remarks from other people. oh yeah, i have first period gym this semester so maybe that has something to do wit it - since i smell good before goin to school then change into gym clothes, get sweaty, and change back into school clothes? HONESTLY i've tried every possible variation there is when it comes to trying to stay smelling "fresh" throughout the day, using deodorants during school, putting cologne/febreze on my clothes during school, washing my face with antibacterial soap, etc.so only question is... WHATS MY PROBLEM!?! haha
please help - perhaps if anyone could tell me of their experiences and how they got through the day (i've been considering bringing two sets of shirts everyday)