I'm sorry you are struggling with this.

I can't tell you whether your skin picking is related to OCD, anxiety or something else. I think you have to rely on the mental health professionals in your life for that. Perhaps there's going to be a need for further discussion with your therapist in order for her to come to an accurate diagnosis. You may have already taken it, but here's a link to the ADHD screening quiz here on PC:
https://psychcentral.com/quizzes/adhd-quiz/
Family therapist, Kati Morton, has a video on her YouTube channel on the subject of skin picking. Here's a link to Kati's video:
One of the treatments Kati mentions is called: "habit reversal training". Here are links to 2 articles, from PsychCentral's archives, on this subject:
https://psychcentral.com/blog/the-go...-habit-change/
https://psychcentral.com/lib/whats-t...ling-disorder/
And then, here is a link to another article on the more general subject of habit change:
https://psychcentral.com/blog/scienc...sts_position=2
And, lastly, take a look at this website for people who struggle with skin picking. I don't know anything about it myself. I just happened to come upon it in the process of replying to your post. But it may be worth taking a look at:
https://www.skinpick.com/
My best wishes to you...