I also have a problem with napping, but for a different reason. If I sleep during the day, my heart starts to beat really hard. Like visibly hard, think it's be

I also have a problem with napping, but for a different reason. If I sleep during the day, my heart starts to beat really hard. Like visibly hard, think it's because my HR drops low? Anyways, it's uncomfortable and makes me avoid it. Most people online seem to have the opposite problem, heart racing after a nap. Never found explanation for what happens to me that makes sense.