Fluttering heart can be caused from hormonal imbalance , endocrinology issues, parasites , allergic reactions to food, ( I would stop wheat for sure ) pollen, plants, pets, hidden mold etc. oh yeah, tea bag, coffee bags or filters might have chemicals. This sent a friend to the ER; took? months to figure it out, vitamin deficiencies, viral bacterial infection. and just stress, caffeine or course hidden dental infections. I had PVC; the cardiologist gave me something Metrophale something I was so sick - migraine sick vomiting.? Ditched the cardiologist and found a great Chinese Medicine doctor First week of taking Chinese herbs I felt so much better , and then I also started taking organic virgin coconut oil harvested from FRESH coconuts. This is key so there are no mycotoxins. I now feel dramatically better.