Hi Andy
Well I can understand the concern about the tinder profile. Perhaps she isn’t lying to you and it is an old one? People can forget about these things.
But becoming suspicious and cyber stalking her because she has a facebook page is a bit of a leap.
I can understand why she needs some space because that is a betrayal of her trust in you.
It is difficult because both of you have experienced a lot of trauma in the past. Clearly this is bringing up a lot for you both.
I would recommend having a calm and honest conversation about all of this when things calm down.
It is really hard to trust people after everything both of you have been through. But not everyone treats people terribly. There are good people out there. You thought she was a good person? Try giving her the benefit of the doubt.