Dimple on breast

Ok. I just had my annual pap 2 weeks ago and had a little rash under my left breast that she gave me cream for.  My appointment was fine. I had an iud put in last week and will go back for a recheck on jan 20th.  Tonight when I was applying cream to my breast I noticed a very small dimple in the crease where my breast stops.  There is nothing else.  No lumps, no pain, no nothing.  Is this something I should be concerned with?  Will it be ok to wait until my doctors apt to have it checked? Thank you.

I have a indent in my right breast went for ultra sound today now wants to do a mri scan.