Falcons linebacker Curtis Lofton fell on Stafford's right leg during Detroit's last play of a 23-16 loss Sunday to the Atlanta.
Stafford played in only three games last season because of shoulder problems and has missed 19 regular season games over his first two NFL seasons.
"I'm moving around OK right now, so we'll see," Stafford said.
Coach Jim Schwartz wouldn't speculate on Stafford's status for the Lions' Week 8 game in Denver. Detroit has a bye the following week.
"We're going to check him out. He sort of limped off the field at the end," Schwartz said after the game. "[We'll] look at his knee and his ankle. We'll see where he is this week."
Stafford said after the game that he wasn't exactly sure which part of his leg was hurt, but told multiple media outlets after the game that he expected to get X-rays on the leg. Stafford said he would have attempted to stay in the game if the Lions had regained possession, but Atlanta was able to run out the clock.
The Lions (5-2) are already missing starting running back Jahvid Best, who sat out Sunday's loss after suffering a concussion last week.
Detroit has now lost two straight ahead of next Sunday's matchup against Tim Tebow and the Broncos.
Information from The Associated Press contributed to this report.