Welcome to the forum!

That does sound like sleep paralysis though it would depend on your awareness. Freezing can also be an anxiety component of certain dreams. It's up to you to be sure.

I think OctoberWind already gave you a good direction to start in so I'll leave things at that. I hope you do become an active member of the community.

If you have any questions feel free to post them or send me a private message by clicking on my profile picture and using the links.

Happy dreaming!