Former West Ham favourite Lomas was booed following the Sky Bet Championship home defeat, with a section of them calling for his head.
But after seeing Emmanuel Ledesma and Albert Adomah end their seven-game unbeaten home run in the league, Lomas was defiant.
"Of course I can turn it round," said Lomas, who spent eight years playing at West Ham.
"I understand fans want to win games of football and we have been on a pretty good run at home.
"But unfortunately our away form's been affecting us or we'd be a lot higher in the table.
"But we have been decent at home. We've got to remember that and the positives in that run - and we've got to bounce back away at Watford.
"We've got opportunities to bounce back over this Christmas period. It's a crucial period as there are so many games over a short space of time. You can pick up points and push yourself up the table.
"We've had a reaction all season from the players. We've had some disappointing performances and results but we've always been able to bounce back.
"They're all tough games but we've got two away games to get our away form going."