Advice on photo assigment after mistake

Sorry, this is long and a bit confusing but advice greatly needed about how to salvage a possible lost photo job.

Last weekend I was hired for a two-part assignment - shooting the "departure" of a group of cyclists on a charity bike ride (think pictures of hugs and waving goodbye) and then also booked to take pictures tomorrow (Saturday) of their "return" to town (celebration, picnic, whatever).

For background, the editor is also participating in the ride, so she is communicating (and updating the website with her photos ( not mine) only early morning or evening.

So... last Saturday, after shooting pics early morning, I did not edit or make them available to the editor as I was out all day. In my mind I was thinking she was going to use them on the event website (think "pictures of last years event) and not use them immediately/daily. So she emailed me around 5 asking if I was going to get her any pictures, but by the time I got home and replied to her second email, it was 9pm and she was probably asleep - and it took me until 10pm to get photos available. Which, considering I had about 40 images to offer her, I stupidly decided it would be easier to upload them all to a Flickr account, instead of e-mailing them all to her.

I did not hear anything from her until Sunday evening, when we messaged each other and she said she had a glance at them early in the morning, but did not "know how to download copyrighted pictures from Flickr" (unless I am wrong, right-click and save image, no?? and they are all set to public view).

So I messaged back, would you like me to email them instead?

She replied "no, that's OK"

And that was the last communication I had from her.

I freely admit I screwed up, although completely unintentionally. I should have clarified when the pictures were wanted, and how she wanted them sent to her, and so forth - totally my fault.

I emailed her the middle of this week, apologizing for completely dropping the ball on getting her pictures in a timely manner, and even urged her to cut the amount of money she's paying me in half, since I goofed. No reply.

I emailed her on Thursday just saying I want to touch base about the "arrival" when, where, and so forth (I only have vague info from the event website).

I have not gotten a single reply!!

It's now Friday evening, and I need to know how to plan for tomorrow. If she is going to want my services, it would be nice to know - otherwise there are other events I can go shoot. However, I don't want to just not bother showing up at all - since I don't know why she isn't communicating but I don't want to show up (and waste half the day waiting) only for her to say she doesn't want me.

I know she has internet, since she has uploaded pictures from along the way - so it's quite perturbing that she has not replied. I don't want to look the fool, I freely admit I screwed up with the first part - but what's the professional way to handle the second unknown part??

What should I do??