My Girlfriend is going to leave me because?

She's going to leave me because she feels guilty about me fingering her, I know she enjoyed it, but she feels guilty and might break up with me as yesterday she sent me a message saying my name and a question Mark , iv got a feeling she's going to break up with me because after we were done she was really moody and said we went to far and that it hurt her a little bit and that she does not want to speak to me again after I leave her house I tried apologising many times I'n her house she wouldn't forgive eventually somehow I started to make her giggle and laugh and just before I left she kissed me for a very long time and as I walked away she called my name from behind to say bye now that i am back home I'm worried that she's going to break up with me because she feels guilty and wants to abide by what she said earlier that evening, what should I do? Remain elusive so she can't, or what? Help I want to atop this break up and stop her feeling guilty