John,don't worry about posting in the wrong section,a nice moderator will soon move it for you.
Afraid I can't really advise on your particular incident as I have never had a carpet ripple up just by applying pre-spray.
I have had a couple of carpets ripple up after cleaning but they have always settled down again when dry,they were old foam backed and certainly past their sell by date.
I would wait until they are completely dry and then have another look before panicking .-John