Thatll be nice once its done and nice to have someone to help you out.
I'd say fuck it and take the hours. $$$$$$$
Also, I get the whole "Not being prepared" thing. I don't mind working a 12 hour+ day when I KNOW about it in advanced and can plan accordingly. There is nothing worse than finding out, while in the middle of your shift, that you have to stay later. I'd rather work a 12+ hours shift with notice than work even an extra hour of OT unexpectedly.
Yea, sudden change like that is not something I handle very well honestly. I like to have things planned out and known so I can be prepared not just for the work or whatever, but mentally prepared for what my day holds. Obviously life is not so simple, but for example I had to cancel my dinner plans with my gf tonight, that chicken I left out to thaw so I could cook tonight, now that's just sitting there, not a huge deal but shit like that which I planned for but now is shot because of someone else's poor planning.
I think I am just going to stick around tonight, just easy hours that I can use. Since to go back to living with your brother, my younger brother lives with me and pays rent to me which I put towards my home mortgage. A very nice living situation we both have, being that we grew up together, pretty easy to live with. His benefit is a cheap rent, and my benefit is someone to help pay the bills. Well he announced he is moving out (to move in with his gf and he will be paying over double what he pays me) so now I'm thinking I am going to need every dollar I can get until I get the house situation settled down and I get my shit together to cover the expenses he was essentially paying for.