This 100%. If you understand what needs to be done, you want the long term goal, and yet you still feel severe emotional pain when trying to engage in the work required, it might be ADHD. I highly recommend to anyone who struggles with procrastination that they go see a doctor or psychologist who can assess them for ADHD. And, yes, it takes a skilled professional to diagnose you.
Take heart: “ADHD impairs the functioning of highly intelligent people, so the disorder can be diagnosed in this group. A population-based birth cohort study of over 5700 children found no significant differences among children with high, average, or low IQ and ADHD in median age at which ADHD criteria were met, rates of learning disorders, psychiatric disorders, and substance abuse, and rates of stimulant treatment (Katusic et al., 2011; Rommelse et al., 2017).”