yesterday I began to shake like a seizure and my hearbeat wa so fast and strong . I could hold anything or stand. It took 3/4 of an hour to pass by lying done. deep breathing and water. I really thought I was going toi have a heart attact. Over years I have had some sezuires-6 grand  seizures where I lost consciousness,  But this wasnt the same. My blood preesure I thought was a bit low . What happened.
Thanks for your question on Chat Doctor. I can understand your concern. By your history and description, there are two possibilities. 1. Simple partial seizures. 2. Arrhythmias. So better to first consult neurologist and get done MRI brain and EEG (electroencephalogram) to rule out seizure. Consult cardiologist and get done ECG, 2d echo and Holder monitoring (24 hour continuous monitoring of ECG). You may need anti-epileptic and anti arrhythmia Chat Doctor.  Don't worry, you will be alright. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.