The east London club have not tasted a league victory since the opening day of the season and currently rest 17th in the table.
They are yet to score an away league goal in three attempts and Nolan told the club's website: "We're creating chances and if we weren't creating chances, we'd be really worried.
"It's just about them falling to us now. It is inches rather than anything else. If we just keep doing the right things, we know it's going to turn for us.
"In the last couple of weeks, refereeing decisions have hurt us and it is massive because it could have been another couple of points on the board.
"We've now got five points after six games and we're just above the relegation zone and it costs us massively."
With Andy Carroll still sidelined, the Hammers have been working hard on improving Mladen Petric's fitness, with the Croatia striker having only made two league appearances so far as a second-half substitute.
But Nolan believes the 32-year-old will soon be fully fit.
He added: "Mladen is getting up to full speed with us and we've got Carlton Cole, who is going to join in with us soon in training.
"Hopefully we'll start creating more and better chances and converting them."