Medicine and periods

Need some advice. I've been on this since the end of September and I've only lost 20lbs. Yes, I finally told my Doctor I need to move up to 10ml because I have hit a plateau and my food noise all came back however, is there a corelation between food cravings and your menstruation? I am 48 and now all the sudden I am 25 days late for my cycle and I guess that's a wrap for me. I feel bloated like you do before you start but no peroid. Has anyone else this experience? It is not medication not working because I need to titrate up or is it because my periods have stopped?