Are you anxious from your work environment? What helps me is breathing techniques, I also like to get outside and run, or whatever you can do that makes you happy. Sounds like you're being overwhelmed at work. Figure out a way to ease your workload if possible, or try a different position if possible.

I nap a lot due to nightmares during my normal sleep and a lot of fatigue, and I always feel anxious when I wake up from naps. For me I think it stems from this feeling of being unproductive and wasting time. One thing my therapist said that helped a lot was that napping is actually productive. It’s time in your day when you are taking care of yourself and listening to your body. Thinking of it as a conscious form of self-care rather than a waste of time has been very helpful for me!