I know I'll regret it, but I end up getting angry, and I feel pathetic

Even when it's nothing at all, I find myself getting angry and pushing people too hard without realizing it.
As soon as a little time passes, I feel regret.
I was riding in my mother's car, and while it's only natural that her reaction time slows down as she gets older,
I told her she shouldn't be driving and should use public transportation instead, which made her feel discouraged.
I shouldn't have brought that up.
I feel so stupid and pathetic for why I keep saying things even when I know I'll regret them.