Stopping Minoxidil after 1 use: could this cause any shredding and if so would the hair grow back?

Hi. just wanted to ask a quick question about regains/minoxidal. I used minoxidil once last week but decided that I shouldn't commit to the treatment before speaking to a professional so only a couple of hours later I washed my hair in the shower with shampoo. Also I didn't apply the minoxidil directly onto my hair just on my hairline where it is receding. Could this cause any shredding and if so would the hair grow back?