Feeling uncomfortable

So knowing that this girl had something with my SO 15 yrs ago, but still have pics of when they went to a hotel & did things makes me feel so uncomfortable, also thinking that he asked her to send it to him makes it worse. Once i wanted to tell him that we should go to a hotel & spend time together alone without the baby, but now that i found out this, it makes me feel so upset & i just keep thinking about it 😐. Am i being to dramatic? Is like she mentioned to him that she has a lot of memories like movie tickets, six flags tickets & now that i know, i dont wanna go nowhere with him. Is this wrong?