Neglected teeth for years, have cavities in my wisdom/molars, is it too late to stop it from spreading in this state? (pics included)

[cavityguy22]

Neglected my body for years due to depression during my teens, now I'm taking steps to build healthy hygiene habits. I've had these cavities in my mouth from since I was 15 (now 22) and weirdly enough it hasn't seemed to give me a tooth ache which I'm very happy for. I plan to get these removed in the future but I'd like to know, if I consistently brush every day, will it stop the cavity decay from progressing down to my nerves? Or is it at a point of no return where it'll just keep spreading no matter what I do?

 

[MattKW]

I can't evaluate decay in your teeth based only on photos.
Go to a dentist and get full examination with bitewing Xrays.