Talking to the official site today Williamson has expressed his disappointment and frustrations about not being able to kick on over the last few weeks as the team aim to pull clear of the relegation zone.
Of Saturday's encounter he explained: "I nearly snatched a winner in the last few minutes but that's been the case this season before - nearly! Overall I was happy with the team performance but the not the result as we had done enough to get all three points. Now we have to look forward to the next game.
"When Forest went in front we could have already been two or three in front as we had plenty of chances and their keeper had a great game, he was probably the best player on the pitch.
"We created the chances and we were just unlucky. I always knew we would get something out of the game, we deserved it but that has often happened this season - we've played well but not taken the three points."