Weird sensation

I was laying down trying to take a nap earlier and I got a weird sensation in my pelvic area. Not cramps, not kicks or anything but like something actually moving or pressing down. I’ve had bad pelvic girdle pain, but it wasn’t that. It felt like movement. It happened twice. I started to wonder if it was the babies head? 😳 has anyone else gotten that feeling? I’m 36 weeks.