It is unclear what is causing your symptoms, but you should go see your primary care physician
to get a check-up and further investigate your complaints. Your symptoms do not sounds like a seizure. Even seizures that do not cause whole-body rhythmic jerking and shaking movements usually cause some form of transient loss of awareness or confusion.
On the other hand, heart disease can present with nausea and shortness of breath, as well as a feeling of tightness in the throat. Given that these symptoms are occurring more than once, it is unlikely that they are true heart attacks; however they may be signs that your heart is under stress (the equivalent of the typical angina or chest pain that other people with heart disease may experience). Alternatively, your symptoms may be a result of another process altogether, such as anxiety
, panic attacks or vocal cord dysfunction, all of which could cause very similar symptoms. Your doctor
can help you determine which of these problems is likely affecting you, and help you devise a treatment plan in an effort to relieve your symptoms and stop them from returning.