Vincent had to be stretchered off after he sustained the injury while scoring his side's goal at the County Ground.
Manager Adrian Boothroyd has endured an eventful first two games in charge, with defender Pat Baldwin carried off against Southampton last week and midfielder Kem Izzet red-carded at St Mary's.
"I thought 'welcome back to management'! I've already had two of my players stretchered off, and another sent off," said Boothroyd.
"Ashley had looked a threat. We put ice on the injury, and he's had it compressed. We'll have to wait and see how it reacts.
"But not to worry, because we're still unbeaten and we will take the point."