dont worry-i had water spots from washing my black cherry 370Z with my well water and the sun was going down-but not quite yet. SO-the spots dried and i had etching -minerals in water make a white spot on your car and dont come off with washing. Let the detailer use their magic on it.They might take a PC and some swirl and haze remover ---they wont hurt your paint.
that being said-once it is corrected-if you can figure out where the water came from that made the spots-dont let that water dry on your car via sunlight.
i ended up buying a filter that i screw onto my hose that i wash my car with-and i wash after the sun is totally down. dry with a leaf blower if you have one then wipe the rest of the water off with microfiber towels and some detail spray.
