The screw is out!
The good news is that the screw came out just fine last Monday while I was under general anesthesia.
The bad news is that about a week afterwards my foot started hurting more and the swelling was increasing. (2 days after the screw removal I ran a track workout; it didn't hurt much after the minor surgery at all). So on Thursday, 10 days after the removal, I went back to the doctor who prescribed antibiotics for the infection. I won't post a picture of the infected area, but there was indeed some "leakage" in the area.
After 24 hours of antibiotics I haven't seen any improvement (it actually looks worse than yesterday), but it's supposed to take a few days to kick in.
Keeping my fingers crossed for a speedy recovery...