Shaved my upper back

Hey guys,

Usually I use hair loss creams on my upper back because there is not that much hair there. However today I was in a hurry and had to shave instead in that area. Now im afraid that the hair will grow back more and look thicker. What can I do.

PS. how can i stop razor bumps on my face when I shave. I shave after having a hot shower in order to open up the pores. Is this enough?