ADVICE i caught him, would you be mad ?

So im struggling with body insecurities and other issues with myself and my bf caused them so at the moment we're really trying to get things back to the way it was before it all .. i just had a baby and am struggling with depression from what my so has put me through but im really trying to get pass that

so today my so wanted to have sex so im like maybe ya know (i like to tease a little but he knows its a yes) so i took a shower (i had baby spit up on me and just really wanted to feel more comfortable) when i got out i walk into the room my bf is in and he's nutting to a porn video he was watching and jacking off too on my fucking phone and honestly it took just a few minutes cause i had called him a few minutes before that while i was in the shower and asked him to cut on the heater ... so im standing there looking at him like wtf

I asked him why and he laughs and tells me that the reason he's doing it is because he wants to last longer with me and im just like whatever and said no more ....and now im really just feeling like it didnt help with my insecurities and he should've known that this would bother me, he apologized but idk am i overreacting or do i have a good reason to feel this way ?