Like I said and a few others...live and learn. I have done the same thing, luckily mine was years ago, outside and it was still in veg, so it bounced back.
You could flip them back to veging if you wanted to, but it will take quiet a bit of time for them to fully revert back to the vegative state, I would say that you should be okay to keep flowering them...all you have done is decreased your yeild, and possably prolonged the flowering time...but you learned a lesson here, so it wasn't in vain!
Like OHC said don't beat yourself up about it. I've been growing for a long time, and I still make stupid mistakes...water stuff and realize that I forgot to adjust the pH, or dang it did I already put this in that jug??...it happens alot...we are human. Good Luck with the rest of your grow!