I had the drain for a few days, it's odd when they pull it out - just a pulling sensation on the inside. No pain though.
It's good you're staying with your parents, esp with a 2 yo! If you only had the op on Tuesday it's not surprising it is hard and swollen, mine took weeks to settle completely. I lost my nipples too - but had a further op to reconstruct those and then get them tattooed.
I didn't need further treatment (radio- or chemo-) as I had clear margins, but they did put me on Tamoxifen for 5 years after the second one, so I'm on that for another year.
Your unevenness will probably only be noticed by you, and if it bothers you that much you can always have further work done. I am now considering fat transfer to fill in the parts on mine where I have lost volume, but honestly, they don't bother me that much.
Because mine are muscle I can move them independently, which is weird, and they do odd things when I climb a ladder. You shouldn't get issues like that with silicone though.
When I first looked I burst into tears - it was all just - different. But it all settled down and got better and it's just me now.
Write down any questions you have for the surgeon, and good luck for Monday.