Wisdom teeth out last thurs. Can I still get a dry socket? I have an infection already & just took my 1st dose of amox.

Maybe. Finish your antibiotics. Don't smoke, drink through a straw, no spitting (no negative pressure in your mouth) and you should be fine.
Yes. Dry sockets usually present in first 72 hours, please call your oral surgeon for a follow up appt. Dry sockets can be treated very easily.