dont want to take sides but I do think dolfette came on a bit strong, maybe with reason BUT we don't that, maybe reading more in to what the OP wrote.
That being said. Imagine it from her point of view, she probably thought she was in for a good time and ended up in pain. Not a good start is it? If you're both still talking then you have a chance in making it work. For now don't even think of sex with her but try and do other couple type stuff, keep in mind that SHE may be thinking of sex/where this relationship as new as it is is going. She may decide no matter how nice you are that after the first time went so bad she's just not going to want to have sex with you again.
That being said. Imagine it from her point of view, she probably thought she was in for a good time and ended up in pain. Not a good start is it? If you're both still talking then you have a chance in making it work. For now don't even think of sex with her but try and do other couple type stuff, keep in mind that SHE may be thinking of sex/where this relationship as new as it is is going. She may decide no matter how nice you are that after the first time went so bad she's just not going to want to have sex with you again.