It sounds like she was just giving you that control, not that she was trying to get rid of you or even wanted you to leave, just giving you the control to leave if being there was too uncomfortable or anxiety-making for you. She called to see check in with you later which shows she wanted to be sure you were okay.

If her giving you that out is bothering you, then you need to talk to her about it, but I think you may be making out to be critical or manipulative, but it seems her intent (just from what you've described) is exactly opposite: she seems to be trying to place the power in your hands.