I also had this done about 18 months ago. I was very scared as i hadn't had an operation before. It wasnt as bad as i thought it would be, i was just happy to have it out - i had alot of pain because of the gallstones, so i was so glad that the cramping was gone. When they took it out they found it was infected, so they put me on strong anti-biotics. I felt really queasy after the op - which for me was worse than the pain (i HATE feeling sick). Good thing was that i was able to catch up on my reading in the hospital and finish the harry potter book i was working on
I think i stayed in for 4 days (but I had it done in Germany, Oz might not be the same).

The scars are still sensitive and i hate anyone touching them. That's the only thing that bothers me now. But i suppose it's different for everyone.

Very best of luck. Don't stress!