Is it normal to do something but then regret about doing it later on

Whenever I did something on the internet or in real life, I always ended up regretting about it later. For instance, when I posted something on a forum, I thought I posted something that was typical for an online discussion but after a few hours or sometimes even days, I started to regret about it after reading that post I had wrote.

In real life, This behaviour always ended up humiliating me while socialising with people. I can't make a good judgement before I act thus embarrassed myself later on. It's even worse when I only realized about my mistakes when they're too late to be corrected.

Is it normal this happens to me often? I am starting to worry about myself for not being able to make a good judgement before I act.