The 25-year old thought he had put the Eagles ahead for a second time in the match after he had earlier scored with a magnificent free-kick but his reflex reaction was saved by Forest keeper Lee Camp much to Ambrose's dismay.
"I was off celebrating again for that chance in the second half," he admitted after the game. "He was going the wrong way and I managed to toe it on target but he's made a fantastic save."
Ambrose admitted he thought the Eagles should have got the win and said the team came away feeling unsatisfied with their performance.
"Overall I thought we deserved the three points. Personally I enjoyed myself. I played on the right, and I like to drift in and get on the ball in the middle but I did enjoy myself," he added.
"I had the beating of the full back in the second half and I got a few crosses in and the goal was a bonus.
"But as I said before we're disappointed that we didn't come away with the three points. It was a good game first half, but we edged it second half and we should have got all three points."