Losing weight in a short period of time?

I would do a ton of cardio and eating less. I know that is really the only way to lose weight. But I have had bronchitis for weeks, and I feel terrible, I can barely walk a block without stopping for a few minutes to catch my breath. I am going on spring break with a friend and I am not at all looking forward to putting on a swim suit. Help. If I have to take pills or laxatives that's gonna have to be what it is going to be. I'm 5'7" and I'm 160 lbs on a good day, my waist is surprisingly long so I guess I carry it but not in a swim suit. Help!