Am I reading too far into what my boyfriend did the other day?

My boyfriend “jokingly” went through my phone the other day. We have many problems but he’s never been the snoopy or controlling type (until now possibly). He grabbed it off the bed from beside me and laughed like he was being cute but it didn’t even seem like real laughter. He has done this before but never opened my phone. He opened my phone and said “ooh let’s see what pictures you have in here” and I started giggling, trying to get it back from him. He then opened my Facebook messenger app instead of my gallery and actually proceeded to go down the list of people I’d been texting to “see who I’d been talking to”, all the while acting like this is still some funny joke. I started to get anxious because I don’t have other guys I’m talking to but I do sometimes vent about his occasional mental abuse to my friends and I knew he’d be super mad if he saw that. So I went from real laughing to nervous laughter and repeatedly tried swiping it from his hands, as he continued looking at my shit. All of a sudden he asked in a much more serious voice if I had something to hide. I told him no and he literally was like “you swear on my life”. I told him yes and got upset and said what he was doing was just genuinely bothering me. He went back to his “joking” attitude, saying he was only kidding and returned my phone to me. I would appreciate any opinions. Am I over-analyzing this?
Am I reading too far into what my boyfriend did the other day?
Post Opinion