Girls, how do you feel about lactation consultants?

Girls, how do you feel about lactation consultants? The son has been waking up for breast milk for a month now, I thought it was teething or growth spurts but it's been a month and he's either taking it in a half-asleep state, so we have to wake him up every time or he doesn't take it at all. We're exhausted, I don't know what to do. Is there any benefit from lactation consultants ??‍♀️