My old (15) dog is healthy but is getting worse and worse about accidents in the house. I’m about to lose my mind. Shes also deaf. How much longer can I keep this up before she destroys my house?

I love this girl so much but I’m really wondering when you start having that conversation of when to put her down? I mean, she goes outside regularly but will just choose to mess in the house. She’s getting way more snippy when I direct her. Just getting worried that she’s losing her mind.