The Foxes came from behind to beat Middlesbrough2-1, thanks to an excellent second-half performance.
"I think we were worth our win today," Pearson told reporters. "But that period between conceding the goal and half time, that was precarious.
"I didn't feel we were very positive in the first half. Up until the goal, I don't think it was a great game.
"In the second half we made some braver decisions when we had the ball and got ourselves going which was good. I think that it illustrates that momentum in the Championship can change very, very quickly during games."