as long as there are no invasive cells, i think you can take a little time... you definitely don't want to wait too long, clearly.
i recently did the double mastectomy, and i had a very good experience. i went home the next day, and i was able to do quite a lot soon after. i had no problems taking care of basic care - like getting something to eat or drink and washing up a bit. do you plan reconstruction? if yes, then my impression is that recovery is a little more difficult.
i know other people who stayed at the hospital for two nights, and that seemed to work out well as well.
everyone is different, but i really didn't need much help after going home. i was super surprised. i also didn't really have much pain, except for trying to sleep at night. i was even able to help out with the child a bit!
the drains were a pain, but again, i was able to totally handle those on my own. my better half had expected to attend to my needs at a much higher level... but it turned out, i was self sufficient. it was no problem for me to be home alone... so my better half was able to go to work, attend meetings, etc... without worrying.
i was back at work the friday after my surgery, but only for a half day. the week after, i worked at about a 60% level... one day was a relatively heavy day... and i was TIRED when i got home.... but really, the whole deal felt very manageable to me.
do you have friends or family who can help? someone who can go with you to the hospital? i had friends at work who helped me carry things around etc... that was super nice. i only needed that for a week though.
with your lumpectomy the first time - did you have any trouble with the anesthesia? did you experience much pain?
good luck - i hope you are able to move forward very soon!