I really need help im trying to bring myself back up(bad breath the main problem)?

ok im a 16 year old guy i have neglected myself in my younger years i actually went 1 year without brushing my teeth when i was eleven im super skinny i used to dress horrible i didnt care about my apperance so now i dress myself waaaaay better i socialize with people i have a boyfried yes im bi i dress very very well um i went to my dentist and they said i have to pay 200 dollars to get my teeth done(tarter buildup) so i sold my ps3 to get it done hoping that that what was causing my bad breath but i have very nice teeth now um that kinda helped then i bought an ora brush to clean my tounge that somewhat helped but i can still kinda taste /smell it coming from my throat what could it be im happy with my looks im happy with my teeth im happy with the way i dress i have been putting on pounds so im happy with my weight im just trying to get my breath fixed thanks