Hi,

I just went to Quest Diagnostics so that they could withdraw some of my blood to check for allergies. I was asked to do a 10 hour fast before my shots. After my shots I ate some food and then 30 minutes later while laughing my heart-rate started beating unusually fast for no reason. I have done 1 day fasting in the past for religious purposes so my body wouldn't react differently to 10 hours, and I ate a meal that I would always have eaten. After drinking a glass of water my heart rate became normal again.

Please explain........