Hi Thank you for asking HCM. I have gone through your query. You should check your blood pressure and pulse rate. High blood pressure can give a palpitation. It is better to avoid coffee as whole if you having palpitation. Even though caffeine content is less there are other contents which can cause palpitation in coffee. You can have chamomile tea which gives you relaxation. You can also do deep breathing exercises for relaxation. If that is not helping then a short course of anxiolytics like alprazolam or betablockers like metaprolol in small dose will be helpful. Hope this may help you. Let me know if anything not clear. Thanks.