Suspicious behavior?

Looking for advice on whether anyone else thinks this is suspicious behavior or just let it go? My husband works 4pm-1am. Every night he gets home he goes straight to his office room and locks the door. This started when he started the new job a week ago. I hear the Bluetooth connection turn on as soon as he goes in there, so he's connecting his headphones. Well tonight he came out to make himself throw up and went back in locked the door and then 15 mins later came out and went to the living room to stay up and play games. He thinks im asleep. I'm a very light sleeper so I wake up as soon as the front door opens.

TLDR

The reason I am suspicious is because he has been significantly less intimate lately and angry. I'm not sure if he's meeting with someone online, or watching pornography (he did when we first met and said he quit), but he is private about something when he goes in there every night. I'm afraid to ask him because he gets really angry when I ask questions. He's also been irritable and dismissive of me emotionally. He said he doesn't have time to deal with my emotions. What do you guys think?