There is no doubt in my mind that you need to go to a hospital ASAP and get yourself assessed.
Yes, it could be a panic attack; some of your symptoms are certainly suggestive of a panic attack. However a panic disorder is diagnosed only after ruling out other medical causes of the symptoms.
In your case, there could be an endocrine (hormonal
) or cardiac cause of your symptoms, or it could be something else. It will require assessment by a medical specialist and some investigations before an organic cause can either be diagnosed or ruled out.