Sheffield Wednesday took the points courtesy of Fernando Forestieri's second-half strike, which saw the ball slip under the body of young goalkeeper Dimitar Evtimov.
And Freedman says his side were unfortunate to lose.
The manager said: "Once again, i just felt there was a bit of misfortune for us today. I felt we competed and in the first half Jamie Ward hit the post. Second half, I thought we were in control. There wasn't a lot in the game for either side but an unfortunate error from a young goalkeeper has cost us the game.
"We came here and quietened everybody down as much as we could. I thought we looked quite solid today against a very free-scoring team.
"We've all got to be accountable for the results and persevere with what we're doing."
Freedman was required to shuffle his pack yet again with Dorus de Vries and Ryan Mendes unavailable and Eric Lichaj only '75%' fit.
He said: "Dorus has a stiff back - hopefully short-term, but it's a setback we don't need right now. Ryan had a little issue yesterday so we didn't risk him.
"Eric didn't train all week and, with three very important games coming up before today, I couldn't take the risk.
"He was only 75% and, the type of player Eric is, he's not going to be half-hearted going into tackles. I felt it was wiser to keep him for Tuesday and Friday."