What you describe frankly sounds a lot like you have something like ADHD. Its not something you should let somebody diagnose you with over the internet, but its really worth looking into with a professional if you have similar suspicions. Here's why:

1. Its one of the more addressable maladies. With good CBT, medication, and habit formation, most people seem to receive dramatic improvements in their quality of life.

2. Understanding your brain and its tendencies can be extremely liberating. Instead of feeling guilt and shame about your choices and work habits, you can look at them objectively and mitigate as you see fit.

It took me until I was a decade out of college while seeking help for depression that a psych picked up on some cues from me and gave me an assessment and diagnosis. I wish that would have happened earlier. If that isn't what's going on, it would be a great thing to cross off as well.