Pulis was frustrated that the hosts - who have only 27 goals to their name from their 30 top-flight matches this term - had not been able to find the net.
Asked if he was worried about the side's lack of goals, Pulis said: "Yes, very much so.
"The final third at times has been the problem, but it is something we have to get on with.
"We got into some fantastic positions today and that final ball, or the movement, didn't lead to the goal we need. That was disappointing.
"I thought it was a very competitive game without many chances in it.
"At the end Kenwyne has probably had the best chance of the game and unfortunately for us, he has ended up hitting it straight at Foster.
"When things are going for you, that would have nestled in the corner.
"But it has got us off 33 points, which has been a millstone around our neck - and fingers crossed, now in our last eight games we can push on."