Body memories can feel like anything...anxiety definitely counts! If I was you my therapist might ask me where I feel the anxiety. I usually feel it in my shoulders and neck, like a tightening burning pain. It can last for minutes or days. Emptiness is something I feel in my body a lot too. And pressure in different parts.

They are called body memories because our mind doesn't have control or knowledge of them and they are stored away separately in our bodies. but you can get to know your body. I found it most helpful to treat my body like a friend, ask it who it is and what it wants.

There is a book called The Body Keeps the Score which might be useful to you.