Maybe having seizures.

Since I was around 12, now 14, these weird spells happen.

First, usually completely randomly, I get a feeling like my arms go numb and my chest tightens a bit; not uncomfortably, and it's not like I can't breathe. It's just a bit tighter, as though the muscles in my ribs or something are clenching. This usually, but doesn't always happen. My stomach sometimes bottoms out. Sometimes this fades after a few seconds, sometimes goes on for minutes, and sometimes leads to my hands and upper arms convulsing. The convulsions do not spread, though when I am laying down, often my legs come up to my chest, not as part of the seizure. They are repeated. I get the aura, then a convulsion, then the aura, then a convulsion. This usually only goes on for 1-2 minutes. 

I have complete consciousness during these events. During auras, but not convulsions, I can talk and go about normally. 

Only for maybe 3 months, and this has made me think I don't have epilepsy, when I think about having a seizure, I get the same feeling - kinda. It's the numb arms, but no chest or stomach. It doesn't make me feel like I'm going to have a seizure, but it's the same feeling I get before I have seizures. Sorta like that "walks like a duck, talks like a duck, but it's not a duck" saying. (That is a saying, right?) I'm wondering if it's just a memory response.

- Mac