FRONT TOOTH ARE DECAYING, HELP PLEASE.?

long story short, one of my front teeth started decaying and now it's nearly halfway gone. I've gotten pretty adjusted to talking without showing the decayed area of the tooth so I never took it much into consideration, however randomly today, on the other front tooth, a piece chipped off the literal front of the tooth, revealing a hole of decay straight in the middle. I'm already insecure about my teeth already, and just having a cavity be exposed in the CENTER of one of my front teeth has just made me want to die right now. My teeth are just awful. And about the dentist, no chance. I bring it up to my mom 24/7, but she says we have no money for it, no insurance for It, and that it's too expensive. Idk what to do and I just want to cry or kill myself. Isn't there something I could buy to put over the teeth???? Like an over the counter tooth filling or something? Anything would be useful. I can't live my life like this.