Continuing with Kybella more than a year later?

I had 2 sessions of Kybella, a year and half ago. My doctor said the 3rd session could possibly be optional. I never went back for my 3rd session due to a full schedule of meetings/social events (didn't want to risk looking swollen). is it ok to continue with my 3rd session of Kybella? Any risks since I waited over a year between treatments? The injections left a dimpled surface in the pattern of the patch where I was injected, still there over a year later, should I be concerned?