Speaking as someone who was diagnosed as an adult and has had a history of hypochondria for a variety mental health issues, your story sounds very similar to mine. I’m sure you consider yourself ‘smart but lazy.’ It sounds like you are recognizing some inattentive behaviors, and you are doing the right thing by seeking a professional opinion on the matter. Anxiety and ADHD can definitely co-exist. One thing I would be curious of is if you have experienced hyperfocus, both as a child and adult.
In the mean time some things you could try is setting up a schedule for yourself, as painful as it sounds, or having someone do that for you. Practice mindfulness, as a big part of working with ADHD is in understanding and acknowledging it. Stay active; exercise and working out is especially useful for fidgety people.