TRE WHILE MEDITATING

This concept (TRE) is entirely new to me—I didn’t even know it existed until recently. Lately, as I’ve started meditating, I’ve noticed something unexpected happening. When I’m fully relaxed and focused on my breath, I suddenly begin to experience tremors in my head, and it feels as though my body is on the verge of floating. I try to push through it and stay focused on my breath, continuing the meditation, but I find it difficult. The moment I reach this sensation, I feel confused and usually end up stopping. However, afterward, I notice something strange—I feel lighter and more energetic, even if I was sleepy before starting the meditation or about to go to bed. Does anyone have an explanation for this?