The 2nd and 3rd day of both the sardine & water fasts, I'd start to have heart palpitations (no other symptoms) that would start mid afternon and go through the night. I'd wake up just fine in the am and feel great, like they never happened. I would have lots of salt and at least 1 LMNT raw during the day. What could this be? Should I stop the fasts once the palpitations start? How do I prevent them?