Hi,
The heart palpitations, dizziness, strange feelings in your head, hard time catching your breath, feeling off balance, etc. can be due to panic
attacks (
anxiety attacks).
Anxiety very often coincides with other health issues; so it is quite possible that you could have both issues to deal with, the anxiety and Labrynthitis. It is typical, from my experience, that the ER finds nothing and releases you regarding your panic attacks/anxiety.