The NBA playoffs are as stressful for the wives as for the players. “My anxiety level is off the charts,” Kimberly Chandler, wife of New York Knick Tyson Chandler, told us Friday afternoon. But aside from the trophy and ring Tyson could earn with the Knicks, the couple might also win a Tony, since the Broadway production of “The Trip to Bountiful,” of which they are co-producers, has earned three nominations. The couple are planning to attend the awards show June 9, and Kimberly says she’s already working on her stage face. “I have been practicing my surprise face and my cry, my ‘Miss America cry,’ ” she joked. The Chandlers will also walk the red carpet at the punk-themed Met gala tomorrow night.