I also have ADHD and OCD, and I would recommend trying a different SSRI. I’ve also had issues with one medication exacerbating symptoms of a comorbid condition, but most likely you can find a different combination that works for you. I HIGHLY recommend fluvoxamine, which has basically been a life-saver for me in terms of managing my OCD. I’ve had very few issues with it as far as ADHD symptoms.
You could also talk to your doctor about the numbness; it might be a side effect of the Zoloft/being on an SSRI. I’m not sure if your psychotherapy has involved CBT but that has helped me a lot, too.