Found his Ex's NAKED pics...

My boyfiend and I were working togethee and he had to get something out of his old email and so while searching for it, was when I came across an email with an attachment. It was labeled "my love" and Ive never heard him call anyone "his love" but his daughter and myself....so I click it. And BAM! There she is....his ex....NAKED!! The picture was dated 2016 which weren't dating then. But for whatever female reasoning I am upset with him! His response was to quickly grab the phone from me and blame that I'm crazy and it was before me (both of which are true). It couldnt have come at a worse time. I haven't been feeling too good about myself lately, Im out of work on an injury and I have this awful image in my mind that wont leave. Its like a still frame that repeats. Ive been trying to keep my mind off of it but it keeps going back to this mess of a memory. Am I over exaggerating?! He didnt offer any sort of reassurance or apology for not having it in the first place! Like wtf. Do I let it go? Forget about it? At this point we are not speaking, unfortunately. HELP!