Saturday's 2-1 loss was a fourth consecutive defeat for Newcastle, leaving them in 14th place on the Premier League table.
"My belief in myself can't waver, and it's not. I think that is in every moment, that's in good moments where I try to stay level and calm and don't believe the hype one way, it has to work in reverse the other way, where I have to retain a belief in my work, my staff and what I do," Howe said when asked about his future.
"Despite what other people say, that is there, but of course, I am very aware of those results, and they aren't good enough."
Asked if there is a danger of Newcastle getting sucked into the relegation battle, Howe was dismissive.
"I don't know about that. But eight defeats out of 11 isn't good enough," Howe said.
"Again, it was a lack of goalmouth action from our perspective. I’m torn between the two things. We need and want to create more at home – more goalscoring opportunities, more shots.
"We’ve come away with 12 shots at the opponents’ goal, and that’s not enough. But then the other side of the coin is that we haven’t defended the two goals anywhere near well enough either.
"With both sides of the game at the moment, we’re not quite there.
"I’m beginning to say the same things as well, and that’s a huge frustration for all of us.
"The players are feeling that frustration equally as much as anyone else. The late goals, again, there was no reason for that to happen today.
"Both teams have made changes, our subs did pretty well, and I thought their subs did well too. But the big moment in the game goes against us.
"There were a couple of big actions in that goal – we lose headers, we lose our runner from a cross coming into the box. That’s been systematic of what’s happened in recent games."