I came home with one drain after a WLE/Lymph node removal last month. Had it in for about a week. I saw the breast care nurse in the hospital who took it out. Having the stitches removed was slightly uncomfortable, but I didn't feel the drain itself being removed at all. And it was such a relief to no longer be a bag lady!
I hate it when hospitals send you home with drains, do you have to go back to the ward to get them removed or will the district nurse come in to do it for you? It is honestly not as sore as you think, although sometimes they suggest you take a couple of painkillers beforehand, but given your surgery I am sure you are on plenty medication anyway - you should always take a deep breath when asked to do so. It's a weird sensation of them coming out, but not necessarily a sore one. You will just be glad to be rid of them really so think about it as a positive move. Compared to a MX and LD flap it is nothing in the great scheme of things. Hope you are resting and recovering well - don't do too much, and no lifting stuff!
K M x