Some observations. The first line made be think she was bracing herself for the impact of another car, proximity of words is all : parked--drive--braced--impact.

I was thinking, unless the house has unexpectedly changed when the doctor enters it -- you know; it has become wonderfully tidy or something -- then why not have her seeming 'blah' about going in and then describe what she is seeing AS she is doing her housecall. That way you can incorporate other senses too, like the smell of cat dander making her want to sneeze and the already way-too-loud TV that gets even louder during the commercials.

That's just my thoughts on this snippet, who knows what's in the next paragraph. I certainly would keep reading, but would hope to have some action sooner rather than later.

BTW I notice you are new. Welcome , I think you'll like it here.

Also, I was thrown for a loop by "It was as dingy as a 30-year-old prom ticket." The comparison was so strange that I found myself dwelling on it instead of really paying attention to the next couple of lines. I think comparing the house to a prom dress rather than a ticket might have been less startling for me, but still unexpected. I hadn't even remembered that my prom had a ticket.

Sheila parks in the drive, bracing herself for the last house on her rounds. And that's it. That's everything we find out about her, the POV character. She utterly disappears. Like Omakase says, why not give us more of her POV (though I would suggest including it as you describe the house, the description is presumably a representation of her thoughts on the matter).

I see how my MV disappeared from POV as I rushed too quickly into introducing her world to readers before introducing her.