Not a heart attack or stroke. Seizure?

Driving home from work….
It started out with extreme pressure in my upper back and spine. The pressure traveled to my shoulders, face and head, which left a very scary feeling in my head like something really bad is going to happen. I started to take deep breaths and my throat felt weird, like I couldn’t swallow. I had to pull off of the road bc my body had this sinking feeling and I was getting very weak. I couldn’t raise my arms. My head started falling forward toward my steering wheel and I felt like I was getting ready to pass out. This horrible feeling came over me that I was getting ready to die. That lasted for about a minute all together….
I had several episodes before that one, but they weren’t as bad. It’s like they built up to that one. They also made my left arm pull to my side and made my fingers curl under. This happened in April’21. I haven’t had anymore episodes until last month. Everything is starting again. I do have lesions on my brain, most signs of MS, but no diagnosis. My ANA is 1:2560. I also have a lot of damage in my spine….
I’ve got to figure out what happened in April’21. I could have crossed the centerline and killed someone. 😭 My cardiologist says my heart is fine and I don’t have any signs of a stroke in my brain. If anybody has ever had something like this to happen to them, please share.