My son had night terrors, and it probably started about the same time... went on until he was about 6... he would seem like he was awake, but wasn't really. I would go into the room and everything would seem fine. It was just something we had to outgrow. My son never remembered any of it. He did have some bad dreams that he was later able to tell me about once he was old enough to talk and express his feelings... but he really never remembered the night terrors. He later had recurring nightmares, but I gave him a technique to stop those and it helped... when the child wakes up, have them finish the dream with an ending they create - can be silly (e.g. your mother suddenly arrives with cookies and the monster is so shocked that he becomes friendly and you all share cookies together), or whatever - best if it's something unexpectedly funny - completely takes the fear out of the dream and that dream usually doesn't return, but that is also different from night terrors - just something else we dealt with along with the terrors... I know it can be scary, but just be there to comfort him. If it is truely night terrors, he likely isn't actually waking up, so don't be suprised if once in a while he hits out at you - he probably doesn't know - but if you just lay him back down and he goes to sleep, great.