Demps suffered the injury Wednesday while playing in a game in Los Angeles and had it examined by a doctor in the area on Thursday. He will meet with another doctor in New Orleans on Monday before deciding whether to have surgery immediately or wait until after the season.
"It's still pretty painful," Demps said on Saturday. "I have no clue (what will happen). I have no idea what these kind of things can do. I'm going to wait to see what the doctor says. I will get the doctor's opinion and talk with my family and the people at Northwestern and make a decision.
"I really want to play this season and help them get to the next level. I'm trying to stay as positive as I can. I'm trying to enjoy my family seeing them this weekend and keeping my faith in God. I think the main thing is my faith in God brings a positive attitude."
Demps, a 6-foot-3 combo guard, was expected to contribute immediately for the Wildcats this season and help fill the void of graduated four-year starting point guard Michael Thompson. Demps averaged 16.5 points, 4.5 assists and 3.5 rebounds during his senior year at Ronald Regan High School in Texas.
Demps attended classes and worked out with his new teammates at Northwestern throughout the summer.
"It was incredibly fun," Demps said of his summer. "I knew my teammates, but now we're starting to become a family. It was a great summer. I think we could do something really special this year. The reason I came to this school was I really wanted to just help the team in any way I can to take the next level. Not (just) make the (NCAA) tournament, but make some noise in the tournament."
Demps said he hadn't spoken to Northwestern coach Bill Carmody recently, but did talk with assistant coach Tavaras Hardy. He expected to speak with Carmody following his doctor's appointment on Monday.
Scott Powers covers high school and college sports for ESPNChicago.com and can be reached at firstname.lastname@example.org.