Paul Lambert admitted Rovers' decision making in the final third was not good enough.
But the Scot did feel Rovers were denied two clear penalties in the 1-0 defeat to Cardiff City.
Joe Mason broke the deadlock midway through the second-half after pouncing after Shane Duffy had cleared off the line.
Rovers were unable to find an equaliser and Lambert insists his side must come through what has been a tricky period.
"I thought it was a close open game, there wasn't too many clear cut chances," he told Rovers PlayerHD.
"We've got to get through this little period of time of difficulty, we will do it but we've got to do it quickly.
"We've got to come through this difficult moment and take the criticism that comes our way and we've got to turn it around.
"Chances were there today, our decision making in the final third was really poor, it should have been a lot better than what it was.
"We got in some good areas to make things count, we have to keep working hard at training and that's what we'll do.
"I saw the first penalty shout and I've watched it on the tape as well, he's pulled Hope's arm, how he's not picked that up I don't know.
"The second one was blatant, we just aren't getting the rub of the green at the minute."