The first will be last and the last shall be first. Don't worry, the people who really need to know who did the work already know. This doesn't just mean you either.
This will happen in life all the time. Just remember if you are ever given credit for something you didn't do to make sure you set things straight.
I wouldn't really call this being a push over. You are not out a bunch of money or losing a job.
Chin up bud. You are honourable and have integrity. These are qualities of the few.
