The Red Devils defeated Zorya Luhansk 1-0 in the Europa League on Thursday night to make it three consecutive victories in the past week.
United bounced back from a three-game losing streak to beat Northampton Town in the EFL Cup last Wednesday before impressing in the Premier League with a 4-1 demolition job on reigning champions Leicester City on Saturday.
Thursday's triumph over Zorya was much-needed for United's Europa League hopes but Mourinho was not getting ahead of himself as he quickly prepares his charges for Sunday's league meeting with Stoke City.
"It was difficult, we had chances in the first half but we didn't take them and they were organised with people behind the ball," he told BT Sport.
"One week three defeats, one week three victories.
"I was not depressed with the defeats or on the moon with the victories. The game on Sunday is now the most important."
He added: "We have almost everybody in position to play.
"It is a very difficult match, Stoke (do not belong) where they are in the table... they have a good manager and players."