Is it normal for my nipples to be damp?

My nipples have been red and damp. Not wet but they glisten in the light and after I wipe them the glistening is gone and the feel damp to the touch. It's like a thin layer of some type of fluid.

In the past I have had my nipples leak a drop or 2 of clear liquid a few days before my period started but nothing like this. By leak I mean I literally saw a drop of some liquid just sitting on my. Ipple. A really tiny drop but a drop none the less.

Is this something normal that can happen when it's almost that time of the month or is there something wrong?