David Ross is admittedly not much of a crier. So when the Red Sox backup catcher became emotional in a normal conversation with his wife just days after taking two foul tips off his forehead, sending shards of plastic and paint from his helmet flying into the air, he knew there was something more going on inside his head. Ross, who was activated from the 7-day concussion disabled list yesterday, spent 13 days away from game action. He talked about his second diagnosed concussion in the major leagues before the Sox took on the Indians last night at Fenway Park. “I was eating lunch and got sick. Riding in the car I got real sick. I was talking to my wife about normal stuff and I just got emotional, started crying at the drop of a hat and stuff like that. I’m not really a crier,” Ross said of some of his symptoms. “It was weird. My wife was like, ‘You are messed up. You need to see a doctor.’ ” Ross said he felt good in the hours after getting drilled twice in the ninth inning of a 3-2 loss to Toronto on May 11, but when he got home, he could feel the described symptoms of a concussion coming on strong. Ross slept most of the day when he got home and had a hard time adjusting to bright lights, causing uncomfortable headaches. In 2007, Ross, then with Cincinnati, was placed on the 15-day disabled list after suffering memory loss from a collision at the plate with the Padres’ Mike Cameron. The symptoms of this most recent concussion came on slower than his first one in what he thought was nothing more than a usual lump a catcher takes.