Porn?

I'm okay with porn as long as it's not this big secret and he's not hiding it or going behind my back. Well a while ago I woke up to him on this website thats like a "board room" I guess? I don't know but its called 4chan or 4chen I don't know exactly and I told him that made me extremely uncomfortable and I do view that as cheating because he can actually talk to the poster because its really just a big ass message board thing. Well tonight I woke up to him on it again and I honestly thought he was just watching porn so I was like ayyee but no when I asked him what he was watching he grab his phone (he set it down when he realized I was awake) and closed that tab so freaking fast. I got really upset and came down stairs. He hasn't even tried to check on me and I know he went to sleep because I can hear him snoring so he literally just doesn't even care. I honestly feel so disrespected and I just wanna leave at this point because it has been a conversation in the past but we literally just got married a couple days ago and we're already doing this shit. Do I have a right to be upset? Or am I just being dramatic?