Chronic bad breath/halitosis

Hi everyone,
i have been suffer from my chronic bad breath since 203/2014 until now, i am 24yo female. i have a gastric problem/acid reflux and i thought that that is the cause of my chronic bad breath. i went to the doctor and did breath test to see if there is any bacteria called 'Helicobacter pylori'and the result is i don't have that bacteria inside me. then my doctor told me that is stomach ulcer and he prescribed me 20mg Rabeprazole Sandoz medicine.
Also i've been diagnosed with 5mm gallbladder polyp through the result of my ultra-scan. I read from a lot of website that both of them causes chronic bad breath.
I also went to my dentist to check if i have gum disease and my doctor also check my tongue and he said it's clean and i don't have gum disease etc. but when he test my saliva level is very low, is it because of my ulcer and my gallbladder polyp? that my saliva is very low? is there any way that i can increase my saliva?
I isolated myself from everyone because i have no confidence to talk to them. Every time i talk to them i realized that they start to close their nose with their hand. I am really confuse what to do now, because i'm really tired of this bad breath that makes me stay at home every single day because i don't have any confidence at all. i started to not to talk when my friends around and always talk with my hand covering my mouth until all of my friends said that i change because i don't want to talk and some call me 'mime'. Also if i'm in the room with someone and i try to talk far away from them it seems that they still smell my BB from a long distance.
can everyone tell me what is the reason of chronic bad breath, i'm so desperate to cure this Tweet