New Lucid Experience - Bodily Sensation question

Hey, I just got lucid last night after waking up to watch the World Cup and went back to sleep two hours later (a WILD of sorts I guess).

So I knew I was gonna be lucid since I usually am if I do this. I got lucid, everything got so real with the sound and vision and touch, and all of a sudden I got this HUGE pressure on the front of my forehead. That’s when I remembered reading something about that on this board a few months back so I woke up scared. It was weird, but I didn’t go with it, I just stopped it and woke up. What happened? Anyone know?