That does not rule out the possibility of a scam.

1. Oversharing can be a form of manipulation to win your sympathy.

2.A scammer can be very selective about the information she shares. She shares a lot so you think she is making herself vulnerable to you. But she is actually very careful about what she shares in a sense that they would only be information that would not hurt her in the long run.

3. These "insecurities" may be lies or acting.

And if she is not scamming you, then she is at the minimum, suffering from delusions (i.e. insisting that you agreed to something you never did).

I agree with everyone else that you should get away from her.