Should I give up my vacation for my (dream?) job?

The vacation that my mother planned two months ago and had been looking forward to since?

And mention how my mom has had it rough these past few days and really deserves it? (If I back out, should I offer compensation? (A picture? A raincheck?))

I face impending guilt.

The possible job offering that...I haven't quite told my friend about yet...

...The friend that was trying to nab it from me...

Should I negociate with the manager if and when he offers me the job to take nine days off?

Will he say nevermind or admire my salesman-like approach?

Gawd, I don't know.

It's really weird when I want something that isn't guarenteed to me. Firstly, because that rarely happens, and secondly because I become anxious about it and worry if I'm losing...I don't even know what. Losing something...

Also, because I have a record of not getting these things that I fight for...In fact, if I do get this job, I'd be the very first time.

Oh, the worry...