Gary Bowyer was pleased with his side's second-half display at Ewood Park although the 1-0 scoreline left him with some nervous moments.
"The most important thing was to win tonight and we've done that," he said afterwards. "We kept going and saw it out at the end."
That result leaves Blackburn in 11th place in the Championship table, three points behind Forest after the Reds' 2-2 midweek draw with previous leaders Watford.
Stuart Pearce, meanwhile, continues to be linked with a loan deal to sign Aston Villa midfielder Jack Grealish. The highly-rated 19-year-old signed a new four-year contract with the Premier League club last week.