Hello!

Sorry if this isn't the right place to post, but I wasn't sure where else to ask about seizures.
Let me begin, and please bear with me through my long history -- About 2 years ago I was on a roller coaster ride, came out of the seat, got whiplash, and I've had problems ever since. About a month or two after the accident, I started getting numbness in my hand, and occasionally my legs. I had an MRI, which was normal. Now, for the last two years I've off-and-on had numbness in my hands and legs, but I just sort of ignored it, as I was assured that everything was normal. Recently, after my hands and thighs started to involuntarily twitch, I was diagnosed with brachial plexus and cervical plexus neuralgia. Then, about a week ago, I started having problems with my right leg (pain from my lower back, through my thigh, and numbness in my foot). I was told that it was sciatica (or something to that effect). HOWEVER, last night when I was laying in bed ready to fall asleep, my eyes felt like they were rapidly moving up and down (as if I was looking at the headboard and then my feet) while they were still closed. I mean it was going so fast that when I tried to imitate it for my mother (with eyes open of course), I couldn't do it even 1/10th the speed. Then, my whole body, especially my arms, started to shake pretty bad. I immediately opened my eyes and I could see pretty much normally, so I assume that they eye movements stopped, and my hands stopped twitching shortly thereafter (maybe another 10 seconds). I thought that maybe I was over-tired or imagining it, so I tried to go back to bed again, but it happened once more. I was eventually able to fall asleep, but could what I experienced be a seizure?
Other symptoms that I had within 10 minutes of the first incident of this were feeling like I had difficulty swallowing, and my tongue was kind of "twisting" in my mouth, and I had to consciously think "OKAY, hold your tongue still!".
Today I felt pretty much okay, but I had a little blurry/double vision (I was told that this could be from the brachial/cervical plexus neuralgia, as I've had it many times before).
So please! I'm very worried! Can you please tell me if these are the symptoms of a seizure, or if they could easily be attributed to the two other existing conditions?
The only other thing that I could think of is that I took Zanaflex (muscle relaxer) for the first time in a month, and I've only taken it maybe 10 times previous to that over the past few months.
Thanks so much!