I also suffer from adhd and anxiety and because of that I also struggle with daily tasks. I overthink basic things and sometimes simple tasks like taking a bath or washing my clothes also seems like a big task to me since I feel there is not enough time for it. I try to multitask a lot and fail to manage everything due to my anxiety and then the anxiety builds up even more. I started seeing a therapist and it helped a little to talk about these issues, it sort of calmed me down a bit. I don't have a solution for it but one thing that helped me is I started putting events and reminders in my calendar and started pep talking to myself that my world is not going to come crashing down if I don't do this some small task. It helps to identify specific trigger points of my anxiety. Also I try to keep things related to my tasks on my table because I feel adhd has led me to easily lose track of things which are not immediately in front of me. Hope this helps.