Episodes and my first seizure

I had my first grand mal seizure on December 16. My husband woke up to me having it and called an ambulance. All scans and mri came back clear. Eeg scheduled for Friday. I have no family history of epilepsy, and no head trauma. Perfectly healthy 24 yr old in other respects! I am on no medications. My main question in this is about my other “episodes” that I’ve had for 3 years now. I am conscious during them. They started out as heart palpitations, and have gotten increasingly worse and more frequent. They started also including dizziness, the feeling of falling, intense loudness, everything speeding up, tightness in my chest, and a difficulty to function through the attack. I can speak, but it is difficult. I usually need to sit down. They only last 8-10 seconds, but can happen 4-5 times daily. I usually have at least one daily, with a rare day of none. I am a worrier by nature, and have been told they sound like panic attacks. But I have a hard time believing there is no connection between them and my grand mal seizure, since I have no other health problems. Does anyone have any thoughts about this? I will be speaking with my neurologist more about this after the EEG, hopefully.