Aw hun ({) (}) sounds like it's been rough for you this month. It looks like you O'd on the 24th to me...but with all the meds, you're right it could be inaccurate. I think swizzle should come analyze, she's good at this game.
Have you considered using OPKs? They are totally the bomb, and make interpreting these stupid charts a million times easier.
I agree with wine about when it looks like you O'd. A one-hour time change shouldn't make that much of a difference in detecting a clear temp shift (and yours is) . My times were off by as much as an hour in either direction, and I still got a clear temp shift.
I'm terrible at the chart interpreter game, but I am (unfortunately) all too familiar with cysts - you have my sympathies! They're the WORST. FX that this cycle ends soon for you and you can get back to TTC.