Pre-trip diet

So I remember the days that I could just say "I want to lose a few pounds before my trip" and poof it happened. That is not the case anymore.... Last week I worked out 5 days straight and I am pretty sure I gained weight. There is no way I can fit into my bathing suit or even possibly my shorts. Everyone says "you will lose weight on the trip" which I am sure will happen but I need that pre-trip body. It's like when people used to go tanning (do they still do that?) before they go to a beach. You absolutely don't want to look like a ghost when you step onto the beach and you for sure don't want to burn. In this case I just don't want people to laugh at me. Let's see if I can make that happen.