Aglifter, I assume you're talking about carrying the R-9S in a shoulder rig? Given your described size, it should disappear!
There are lots of points of specific interest about shoulder rigs, and although many folks dislike them, I have considerable personal experience with them, and find them quite useful and comfortable, as long as you make your choices and adjustments circumspectly.
I've even written a little monograph on the subject which might be of possible interest or use at http://www.parkcitiestactical.com/shr.htm
The main issues are choosing a style of rig (vertical or horizontal) and choosing a size of gun appropriate for your frame; a smaller person can conceal a large gun more readily in a belt holster (especially IWB) than in a horizontal shoulder holster, for instance. With judicious choices in gun and rig and with careful harness adjustment, a shoulder rig can be an optimal means of CCW.
Best.