I felt silly going to the doctor. While I was in the ultrasound room, though, with the lady checking all along the big vein or artery or who knows what from my groin to my ankle and frowning and highlighting things and thumping my calf and listening to my pulse, my heart raced and I had to consciously breathe. So even though it will be a needless expense, maybe it wasn't a needless expense.
In the end, this doctor trip was more for my anxiety disorder than my leg, though. No blood clot. Just #catastrophize.
I have, however, run 11 miles since the doctor, so there's that.