Tell Me I'm being Silly

I'll try not to make this long and I know it's a common topic, but I need someone to tell me I'm making something out of nothing. Last month I discovered that my DH opened a new bank account in his name only in February. He never told me about it. I confronted him and he gave me three answers, obviously embarrassed. I told him it made me feel like he was hiding something else. He said he wasn't. So that got my suspicions up. He's on his phone all the time and frequently typing. Turns it off when I come near. We don't share passwords, so I have no access. I accidentally discovered that he has a gmail account I wasn't aware of. He swears he's not cheating. I've been checking in on him via "Find me" and two weeks ago he was out at the mall by his work and even though we were on the phone chatting, he never even mentioned it. Putting his clothes away this weekend I found a small box, like the size for a bracelet in his drawer. It was empty. (The store isn't the same place as the mall he was at.). I'm going nuts and feeling like he's lying. I can't check up on anything and he's already denied that he's cheating. I asked him point blank, We don't have any big celebrations coming up. I don't know what to do. My radar is totally going off but I can't find anything to make it stop- one way or the other. I hate being this type of girl. Please tell me I'm being silly.