How do I know I have Somatic OCD surrounding my heart rate?

Hey Ruby :) I've certainly dealt with this before so I'm hopeful I can answer some of your questions. Generally, somatic OCD can manifest as checking compulsion, or often we can become obsessive about sensations in our body. For instance, for me, I experience a ton of health-related OCD and amidst my recovery, I began to become hyper-aware of my heartbeat. When you fixate on a sensation or bodily movement it can classify as somatic OCD. If this sounds like something that is familiar to you, ask your therapist about interoceptive exposures, which work to recreate the physical sensations in a safe setting. You can read more about interoceptive exposures here: https://psychcentral.com/anxiety/interoceptive-exposure-for-treating-anxiety Here are some additional articles and resources concerning the topic: https://www.treatmyocd.com/blog/what-is-somatic-ocd and https://iocdf.org/expert-opinions/when-automatic-bodily-processes-become-conscious-how-to-disengage-from-sensorimotor-obsessions/ Hope this helps!