Awesome!! Congratulations on the lucid!
Don't worry about how stable it was or whatever problems you had. Those are going to sort themselves out in due time. Most of my early lucids were dominated by weird problems of some kind or the other. It's part of the journey and dismantling these obstacles can be a lot of fun.
I have had
the precise problem that you experienced. I got pretty desperate, so I attempted an out-of-body style exit from my body. Basically, I created a new head, torso, and arms and sat up out of my "old body". My legs and hips were still glued down when the dream scene collapsed, though, so it was only a very partial success.
This is my old DJ entry for it if you are curious:
Sunny Day "Sleep Paralysis" - Dream Journals - Lucid Dreaming - Dream Views
For what it's worth, this never happened to me again, so don't worry too much about it. If you find yourself thinking about it, picture what you would have happen differently this time. Don't spend too much time seeing yourself "stuck". Imagine freeing yourself and moving straight to your lucid goals.
Congratulations again!