How do I handle a situation where my girlfriend is upset because I couldn't understand what she wanted during a call?"

Heyy guys I need help I know it may be cringe but my gf is upset from me We were having a call raat me just hearing each other's breaths Then it got heavier, I was hearing her deep breaths , and suddenly she started saying I can't control myself , I want you now . And I'm not sure what she was wanting from me . Maybe it was sex but it wasn't possible as we don't live near . And now she is upset that I don't know what she wanted, and I'm shying to say sex 😭