Is it normal to act before thinking all the time?

I guess I'm super impulsive. But I always assume I know something before I actually say or act. Like I thought I was buying wiper blades for my car online.. but when they came, I only got one. And it wasn't until I made the mistake that I actually stopped and had to think better -- that I need 2 blades, each a different size. For some reason my brain is so jumpy and illogical. I never stop to think things through before and it frustrates me. I just make constant careless mistakes. I never do anything correctly