This episode that you describe.
"started screaming and kicking/punching/flailing. I didn't know what to do/what was going on and thought it was just a horrible night mare or something"
your boyfriend he said he was screaming because I was screaming and he felt like some one was in the room and about to attack him.
could very well be a night terror.
During night terror bouts, patients are usually described as "bolting upright" with their eyes wide open and a look of fear and panic on their face. They will often scream. Furthermore, they will usually sweat, exhibit rapid respiration, and have a rapid heart rate (autonomic signs). In some cases, individuals are likely to have even more elaborate motor activity, such as a thrashing of limbs—which may include punching, swinging, or fleeing motions. There is a sense that the individual is trying to protect themselves and/or escape from a possible threat which threatens bodily injury
a simply EEG requested by your neurologist can determine weather this episode was in fact a night terror
These night terrors can occur each night if the sufferer does not eat a proper diet, get the appropriate amount or quality of sleep
The first type of seizure you described sounds like an absence seizure. Was your boyfriend put on medication of any sort? Did the evaluation(s) he had reveal anything else?
The second "seizure" does not seem at all like sleep paralysis. It could have been any of a number of things, from seizure to night terror. The severity of the event, along with his and your reaction, make me think he should see a doctor about this very soon.
If this happens again in the interim, do not try to hold down his limbs. Stay back, clear the space around him to keep him safe, and be ready to call 911 for help or take him to the ER if necessary.