Thanks for the follow-up, guys. Day 8 today.
The appointment went well (after some initial awkward fumbling about "No, they didn't *find anything,* I got the mastectomy for...aesthetic reasons...") but she recommended we leave the stitches in for a few more days. She's a GP and not a cosmetic surgeon, so she had no commentary on how my chest was *looking,* but she treated me with complete professionalism and respect.
She did, however, have some choice words for my surgeon who didn't prescribe any kind of topical antibiotic ointment for the incisions or instruct me on how to clean them. She cleaned it up with iodine, swabbed on bactroban, and covered them with sterical gauze, telling me to do this 2x/day until our next appointment. She also recommended I switch from paracetamol/acetaminophen to ibuprofen for pain management and that's helped with the swelling A LOT. I'm still bruising and tender in places but I'm pretty sure the suspected sera/hematoma has been absorbed.
So feeling more positive nowadays and the pain is quite manageable, as long as I take it easy, stay diligent with the medication and keep my chest wrapped up. Looking forward to the day when I can take off all compression and support and walk around without pain! Hopefully my skin will have settled in a position I find more-or-less satisfactory, too.