That's an awesome #!!! Since you don't have much data yet on stuff like that, your plan makes sense to me. If it comes up again you can shoot a smaller dose like Kelly said, or also you can try retesting in maybe 20 minutes (if you have time) and if the # is rising and getting near your no-shoot (200?) then you can go ahead and shoot. I would still reduce the dose at least a little though in this case - you got a late drop/breakthrough, which means this dose might be a hair too high.
Once you are back on schedule I would probably try 2.25 for a couple days - if the #s aren't good, then I would go back to 2.5, and then hopefully get ready for the next breakthrough. If you are home to monitor you can go ahead and shoot a full dose on a PS like this and then try testing at maybe +2 and +4 to make sure there isn't too much drop, and if there is, feed LC to counter-act it. Or you can try a reduced dose, maybe 2.25, and try to get some spot tests to see how that is working. If you can't be home to monitor, personally I'd shoot less, maybe 2u or something, whatever you feel comfortable with.
It's hard not to reduce too much and then lose ground - that's what I did with Bix - ultimately he turned out to be a kitty who needs the full dose even on lower PSs. But personally I think it's good to reduce at least a little and collect data.
I'd probably shoot the full dose though when you give the next shot, since it will be a few hours late and overlap will be lost. Unless that puts you way off schedule for morning, in that case I'd probably shoot a smaller dose today, then shoot a couple hours early tonight, again a smaller dose, and then again a couple hours early in the morning to get back on schedule, and probably a slightly smaller dose then as well, to account for the increased overlap you might get at a +10 shot.
