Okay ladies, I am need of some sort of intervention. I told myself that I would get in shape for the wedding before my final dress fitting. Did that happen

NO. So then I was like well, the dress fits, but if I lose a few more pounds I will feel better and absolutely look better in a bathing suit. Did that happen

NO. So now the wedding is over, I didn't lose any weight or inches for it...but I did look decent. While in Jamaica, I lost 7 LBS from eating regularly (someting I just don't do) and walking so much. I have figured out, that that weight loss is my start to getting back in shape. Now the question is...how do I keep it up? I lack the motivation 100%. Once I start it, I lose inches very fast, but I just can't get my motivation to start it up...
What do I do and how do I go about doing it? My work schedule is a crazy one just as a disclaimer. I work 2 days on, 2 days off, 3 days on, 2 days off, 2 days on, 3 days off and so on... and I go to work at 5:30 pm and don't get off til 7:00 am (yes almost 14 hour shifts.) That is an important part because once I get off, I am dog tired and only have time to sleep... So all you ladies out there, please help a sista out...