Trust or Not

My husband swears he has never done anything wrong in our relationship. My gut says he cheated, I have nightmares about him cheating, and he got something. He went to school for couple months and I got proof he was chilling with two chicks and a dude but quite often with each chick alone. He promises he never did and will never do anything to hurt me but I’m hurting and don’t know to believe him. He came home and within a couple days he started complaining of his dick hurting and not feeling so well. When I bring up certain conversations he raises his voice and gets extremely defensive. He says he’s not defensive but tired of being accused of false accusations. We have two kids and they don’t want to leave their daddy. I’m confused, hurt, emotionally distraught, and closing up. What do you think ladies?