HELPP!!Does Certain Dri Antipersirant really work?

Im a 16 year old girl. Im not fat but im not extremely skinny but im closer to skinny. And I sweat so much and i cant wear my favorite colors to school. And this happens all year round. They told Certain Dri is fantastic and it really works. I was going to order this one 'Certain Dri Antiperspirant Roll-On for Excessive Perspiration - 1.2 Oz" They say put it on at night after shower but so if i take a shower in the morning do i put it Againn or do i put my regular deoderant. Please helpp school started and my shirtts white. Ive already tryed secret and it doesnt work for me. Im not doing that botox thingyy. And i don't like Drysol it irritates and leaves your clothes with a stain. Please Helppp