Adventures of Submissive Pixie

Over the past months I have had a Dom leaving marks( hickeys, biting, etc) on me. Now for a few days I have not had any recent ones. It has made me feel quite like something was off. Has any other sub ever felt this way? 

Can someone that has fetishes end up taking those fetishes to far? Is there a limit that one should stop at or should they go as far as they dare fantasies take them?