Episodes of intense anxiety and stress may cause us to experience physical symptoms like palpitations, numbness, heaviness of heart, sense of loss of control, which is probably what you experienced and have described as "hollowness in chest"
Anxiety may also cause selective attention to certain normal sensations in our body, which we start to perceive differently and catastrophise.
Your description does suggest that you are very distressed and have a lot of health related anxiety which may need professional help. However, further history and detailed evaluation will be needed.
Next Steps
visit a psychiatrist and a psychologist for more information and further management
Health Tips
practice JPMR (videos on youtube) daily.