A couple of questions and I'll see if I can help somewhat.
Are you a smoker? And were you put out for the extraction?
If you're a smoker, chances increase that you may get dry socket, although it may happen regardless even if you don't smoke. But if you do smoke, your chances just increased huge.
Dry socket will hurt like a mutha. If that's the case, the oral surgeon will probably clean out your socket some more and put a sedative paste in the socket which will help a lot.
Reason I ask if you were put out for it gives me an indication of difficulty of the extraction. Wisdom teeth are so all-over-the-map with regards to placement and difficulty to getting out. Some are extremely easy and take literally 5 seconds, and others are extremely difficult. Simple ones your general dentist will usually tackle.
The difficult ones, the surgeon will most likely put you out because he/she will be going to town on you to get those suckers out. You will have your gums cut, and pulled back, your bone surrounding the tooth will be drilled, the tooth may have to be separated into several parts. And this all happens close to nerves and blood vessels. Then when it's all out, the bone is smoothed with a file, irrigated with saline, and the gums are repositioned and stitched. Then you wait to see how you heal. And with those difficult ones, you'll definitely have swelling.
I'm assuming you don't have any bleeding problems just pain?
With that, you're definitely swollen so I would place you on an antibiotic to be sure. You could be swollen from infection as well as from the trauma of having the wizzy out. The salt rinse helps with encouraging drainage of the infection, and to speed up healing. Won't take the pain away per se.
Your surgeon will have an emergency number to call if you call his office. It's usually his cell phone. Leave him a message and tell him you can send him that pic as well. He may just immediately place you on an antibiotic.
Also, consider some Advil as well. You're on oxycodone, but it doesn't have anti-inflammatory properties which will also help. You can take both at the same time.
Sorry for the wall of text. Hope it helps somewhat.
And hopefully your surgeon was like Jen Aniston in Horrible Bosses