The Latics currently sit third from bottom.
"I am happy at Wigan, it is a great club to be at," said McCarthy.
"I am learning all the time. Roberto Martinez and the coaching staff have been different class and there are a great bunch of boys at this club.
"We are three points adrift and there are massive games coming up but I am confident enough because our recent performances have been good.
"Against Man City we were brilliant at times but perhaps we haven't had the rub of the green and maybe we have not been taking our chances.
"So we have been putting in good performances but now we need points.
"We need a few results but we are looking forward to the challenge."