Conspecific. Two or more individual organisms, populations, or taxa are conspecific if they belong to the same species. Where different species can interbreed and their gametes compete, the conspecific gametes take precedence over heterospecific gametes. This is known as conspecific sperm precedence, or conspecific pollen precedence in plants. Heterospecific The antonym of conspecificity is the term heterospecificity: two individuals are heterospecific if they are considered to belong to different biological species.
I think it is probably due to anxiety but not sure. Whenever I lay down afternoon or at night I can hear and feel my heart beating. It feels as though there is a sledge hammer in my chest pounding back and forth. It actually feels sometimes like it is making my body move. I can hear and feel every single beat.
This causes pain, nausea and muscle tightness in the chest -- hence the feeling that your heart is heavy, or those sharp pains when you see your crush with someone else. So essentially, your brain sends a message to a nerve. The nerve responds by making your muscles tighten in your chest. It feels like your heart is heavier, or that you're in pain, or both. When you stop being sad, your brain stops sending the message.