After a defeat like that I was gutted for the fans, players and manager.
A late equaliser can happen but to concede a winner in the 94th minute is a real sickener.
Although Forest had a lot of the ball and a lot of pressure, I didn't feel unduly worried.
But it was an individual error from Ibrahima Sonko to slice it into his own net as he did earlier this season and to allow a free header in the box for the winner was bitterly disappointing.
For me, Sonko has got to do better with the own goal. As a defender, you are going to be put in those situations frequently and you've got to be able to deal with it.
Heading the ball in the box, I thought he was magnificent. But his feet let him down and Jamie Ashdown had no chance.
In the first half, I thought it was a really good performance and they all upped their game from Brighton last week.
It was a really good goal from Kanu and a good run from John Utaka to create the space to allow David Nugent to play him in.
In that situation, you want a calm head and he showed that with the way he took his goal.
It was the first time in a long time that Pompey were ahead at half-time but the difference was the Forest bench. It changed the game.
Forest had a lot of the ball in the second half and Kanu struggled. When you're defending, you need a bit more energy.
You could possibly argue that Tom Kilbey could have gone into midfield and pushed David Nugent up front and you perhaps could have done without the extra centre-back.
But you can always say 'we should have done it differently' in hindsight. Up until three minutes from time, it had worked well.
When you go five at the back and have one up front, generally, their full-backs get a lot of the ball.
When you clear the ball with one man up front, inevitably it will come straight back.
One positive was that I thought Ritchie de Laet had an excellent game. He showed quality on the ball, he was confident in possession and there was some good crosses. He looks a good signing.
When you see the manager going up to the fans at the end of the game, you can read into it that he's had enough and was saying goodbye.
But I read it another way, that he's gone to show his appreciation and show that everyone is sticking together.
I hope so because there is a really tough period coming up.