Hi, Thank you for your question. Most likely possibility in your case could be a panic
or anxiety disorder
that you have faced during last event and currently experiencing. Cause of such panic disorder mostly remain unknown but in this disorder you may feel symptoms like shortness of breath, feeling of choking, pain in the chest, nausea, stomach ache, feeling dizzy, tingling or numbness, chills or hot flashes, bounding heartbeat or fast heart rate, sweating, shaking etc.