Things have quickly started to spiral for the Miami Heat. After winning nine of 13 games to bridge December and January, Miami has lost five straight as it gears up for a meeting with the host New York Knicks on Saturday afternoon. The Heat were most recently embarrassed on Thursday, falling 143-110 to the Boston Celtics in a rematch of last season's Eastern Conference Finals. Bam Adebayo and Tyler Herro each had 19 points while Jimmy Butler chipped in 17 for Miami, but Boston shot a stunning 55 percent from 3-point range (22 of 40) and scored at least 30 points in each quarter. "Yeah, I'm concerned," Butler said. "Don't nobody wanna lose, especially five games in a row. But before you can even think about … winning games, I just feel like everybody&…