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If you have her home address, you can send her flowers. There isn't a lady alive who isn't impressed with flowers. You can also write her a letter. That is so rare these days that it would get her attention. If you get no response, perhaps you should just give her a little time. She may feel differently in a month or two. She may also wonder how much you can possibly have changed if you only just broke up. Sometimes what a relationship needs is just tincture of time.
Perhaps she is checking your online postings. There is no way to tell. Just play it cool for a while and give her a chance to settle down.
She sounds like a sweet person herself. I would wait at least a month or two before trying to contact her. She was evidently in a very bad relationship once before and was badly hurt. She is scared that the way you reacted may be a repeat of that nightmare. She will need a lot of time to put things in perspective. Maybe even 6 months or more.
I think it is mildly encouraging, but it may take quite a while for her to think about another chance.