Online dating issue, please help?

[Christwarrior]

So I met a very attractive girl online, her profile had like 46 pics and we just clicked right away. Yesterday I go to invite her to facebook and twitter, but the profiles had some of the same pics she had sent me were for a 14 year old high school student, not a 20 year old flight nurse going to university in Texas. She has told me a very elaborate and intracate story about her life that matches up. I asked her what was going on and she said that her little sister had made fake FB and Twitter profiles of her and that she was not really on FB or Twitter anymore. I simply asked her to please take a pic of her holding up a sign with my name on it, to confirm that she was who she said she was. She told me last night she would take the pic after she got home from the hospital, because her grandfather was ill. It got late so I said just do it by today before we talk, and that it would be find. At 11 she texts me saying she wont have time to do it today, questions why I do not trust her. I just explained I had been hurt and needed to be doubly sure that she was real before we continued talking. I mean I am 18, and she is 20 so I think we are past the stage of pedophile but what is going on? Did I overreact?
I really need help with this, it also appears she has still been active on the site we met on, her profile pic changed! The site is tagged.com, so its not just for dating, but it is widely used like that.

[Lily]

Yeah...it is kinda fishy !! Maybe she does not trust u either !
So just wait till she sends u a new pic of herself . If she did not, do not meet her .

Can u answer mine? I need a guy's view point !