<human>: Condense the text into a few key points

Preface: I LOVE my girlfriend. I am not leaving her.

Preface 2: I am aware I am not a licensed therapist and am not equipped to "fix" her. She has very recently started therapy without me urging her to. (We had talked about it a long time ago but she wasnt sure about it so I left it alone.) And I've expressed that I'm proud of her for seeking help.

With that out the way..
Sometimes I dont know what to do to help her when she freaks out. Basically what happens is some little thing goes wrong and she gets super critical of herself and begins a negative spiral.

For example, she was coming to visit me for a few days and I live 3 hours away. She realizes about halfway through she doesnt have her clothes and calls her parents first. Her mom is super critical (probably the source of her problems) and told her it wouldnt have happened if she were more organized. Then she calls me and is freaking out. I'm doing very well financialy and I said I was going to buy her some clothes for her teaching job she's going to start when she graduates so it all works out. This doesn't calm her down and she blames herself even though she had umpteen million things to remember to bring.

Sometimes she also thinks people dont like her and are talking about her. Theres really no reason to dislike this girl. She is incredibly sweet and mild mannered.
How can I better be a positive, supportive, and calming voice for her?

Also what do I do on days where I'm having an off day and may not be able to be as supportive?
<bot>: gf has really low self esteem and possibly social anxiety. How do I help? What do I do when I know I wont be able to help due to me having a bad day?