She’s not sulking, she’s sick. There is Broadway chatter that Lea Michele called out of “Chess” after being devastated over the Tony Awards nominations snub on Tuesday. “She gave another excuse,” says one source. “Everyone knows she was upset. She was hysterical.” One source told Page Six that Lea Michele was “hysterical” over being snubbed for a Tony nomination. Bruce Glikas/WireImage But a Broadway insider tells us the chanteuse, who plays Florence Vassy in the Broadway revival and has never got an Tony nomination, isn’t being a diva — she is just really down and out. “She was sick last weekend and probably should have taken off Saturday and Sunday,” says a source. “She really is not well.” Th “Glee” alum has been out of her show “Chess” this week. Bruce Glikas/WireImage Two sources tells Page Six that Michele is actually sick and not being a diva. Bruce Glikas/WireImage “I’m sure she is disappointed as everyone is for her, but she really was under the weather,” they added.…