Am I really crazy?

Hey ladies, I have a strange question and I’m looking for advice. I was looking for a pic on my husbands phone, when I came across a penis picture. A very explicit, sexual penis picture lol. It was dated that he took it December 24th, so 2 days ago. I even double checked. (We don’t send nudes to each other btw) so I found it very odd..I asked him about it and he acted like I was crazy. Said he never took a pic like that and there is absolutely no pic like that in his phone. I checked again to show him, and poof it’s gone. Now he’s Making me feel like I’m crazy. Do you think he is lying?