Personal but need advice!

So we are TTC 3 months now. Me and the other half have a healthy sex life. However he doesn't always climax and obviously we kinda need that to happen to conceive. I've recently found out that he watches adult movies online, I know that all men do it but I feel like he's climaxing foug this but not with me. I feel quite upset about it, it's causing a few insecurities but when I try to tell him how I feel it's all in my head apparently! Is it all in my head?! ?