Scary things happen to me when I get dizzy? Is it normal?

[XenaMoore]

I know the question is weird, but I have noticed something in the past 7-8 months (since late April'16).
Outside my room, on my outer door's arch, we have a horizontal pole for pull-ups.
It happened 3-4 times till now, that I stretched in my room then walked to the pole, hung for a second or two and then stood back up. Once I did, the scariest thing I've ever experienced happened to me.
                                 My vision got completely dark and blurry, and I could only identify the absolute center of my vision. I felt like I had no control over my body and time seemed to go twice as fast. It usually takes about 5-7 seconds before I start regaining my normal vision and control over my body. Once I do, the sides of my arms feel like a million needles is stabbing into them, as if they just went numb a second ago. After a few seconds tho, the arm pain disappears. Then I'm fine.
My dad was near when I experienced it the first time. He said that on the outside, I was only swaying a bit, while standing in place.
The second time it happened, my mom and I concluded it was because I got up too fast from my bed.

I understand that it happens when I move to quickly (?) but the dark&blurry vision, 2x time and the rest just seem too scary to be just dizziness to me.
Am I just paranoid? Is this normal?

[SassyLassie]

Hello~No, this is not normal. I would make an appointment with your doctor as soon as possible. These symptoms are NOT to be taken lightly. My first though is multiple sclerosis, but, I am no doctor.