The sleep thing is called hypnic jerks. Everybody can and do get these. It is part of the sleep cycle. They often occur when a body is overtired or with stress and anxiety. The other things sound like stress/anxiety. Which are being "turned" into something they are not.
My eldest has a serious seizure disorder so I know more than I would like to know about seizures. My daughter had two tonic/clonic (aka gran mal) this past week. HOWEVER, there is a misconception that anxiety/stress brings on seizures. That isn't true. Stress/Anxiety brings on seizures in people who have an EXISTING seizure disorder. This happens to my daughter often.
There IS a psychological disorder called PNES--psychogenic non-epileptic seizures. This is NOT a neurological disorder but a mental one. This is likely what people confuse themselves with when they say anxiety/stress causes seizures.
" PNES are attacks that may look like epileptic seizures, but are not caused by abnormal brain electrical discharges. They are a manifestation of psychological distress. Frequently, patients with PNES may look like they are experiencing generalized convulsions similar to tonic clonic seizures with falling and shaking. Less frequently, PNES may mimic absence seizures or complex partial seizures with temporary loss of attention or staring. A physician may suspect PNES when the seizures have unusual features such as type of movements, duration, triggers and frequency.... Specific traumatic event, such as physical or sexual abuse, incest, divorce, death of a loved one, or other great loss or sudden change, can be identified in many patients with PNES. By definition, PNES are a physical manifestation of a psychological disturbance and are a type of Somatoform Disorder called a conversion disorder."
btw: I am not suggesting you have PNES or will develop it. I am saying that is a psychological disorder that can appear to be seizure. I am also NOT suggesting you are having actual seiaures either
At 23 you are on the outside edge for developing typical epilepsy. Most epilepsy begins by late teens---most often during puberty or under 5. Also a greater % of typical epilepsy runs in families. That doesn't mean an adult can't develop run of the mill epilepsy, they can, but this isn't typical or most common presentation. Adult onset seizures have many causes: illicit drug use, the use of some prescribed meds have the potential in some people, complications of diabetes, dehydration, starvation, heat stroke, HIGH fevers, brain infections, brain tumors, traumatic brain injury (like severe car accidents NOT minor bumps to the head that don't cause anything but a bump/bruise)..... Even with these causes, once the issue that caused the seizure is corrected, the seizures stop.
Lots of people are afraid of seizures. and why not? they are quite scary to contemplate. However you won't just have one because you are afraid of them . Also lots of anxious peeps think odd sensations similar to and just like what you describe are some form of seizure when actually it is manifestations of stress/anxiety. Not seizures at all. Even IF a person develops a seizure disorder, most people with epilepsy lead perfectly normal lives. They swallow their meds and go about life. The hardest thing would be dealing with losing a driver's license until seizures were controlled by the meds.
btw: I am not suggesting you have PNES or will develop it. I am saying that is a psychological disorder that can appear to be seizure. I am also NOT suggesting you are having actual seizures either. My post is simply informative