Haha, freelancing ADHD is a classic! We seek being our own boss so we don't have to be forced to do what we cannot, only to then intensely struggle completing tasks we know we are capable of due to executive dysfunction, and then feel so much shame and guilt over a struggling freelance business leading to even more restlessness!

Anyways definitely seek a specialist, there are many options and even if it's not ADHD they've got access to a lot of really great resources to cope with what you do struggle with.