Feel terrible. Called off wedding.

So it's getting really close to the wedding date but I've cancelled it. My fiancé is pissed. I told him amd my family I cancelled it because I didn't like my dress but it's really because my mouth... my breath smells terrible no matter how much mouth wash I swallow or how much I brush my teeth and tongue. I thought I could fix the issue before the wedding but that doesn't look possible. I've been to 2 dentists and everything I need would cost more than 3,000. And they've said it might not even cure the bad breath. I keep googling cures but nothing is coming up. I'm really anxious. And annoyed. My fiancé always say hey go brush your teeth or rinse your mouth. That makes me feel super terrible like I'm dirty. I always chew gum but sometimes that makes it worse. I've done oil pulling for months and nothing. I barely talk to my fiancé cause I just feel my breath has gotten terrible and uncontrollable. I won't talk to him in a car unless the windows are down and my head is literally hanging out the window. I have gum disease and dont know what to do.I wanna be able to smile without covering my mouth and laugh without holding it in. My fiancé hasn't spoken to me in 2 days.

We have to give the venue the final pay in 3 days. I'm not sure if I should really cancel the wedding and take my half of the money and go to the dentist... Maybe they can cure it, maybe not. I'm confused. Advice?