caught my boyfriend. help please.

my boyfriend and I have been together for a couple years now, we have 2 babies together our daughter will be 3 years soon and we have a baby boy of 2 months. everything was perfect up until 4 months ago .. he was never the type to hide his phone or to carry his phone all around the house or to be constantly watching me while I use his phone to search something up. his behavior was different, he was acting weird so I decided to go through his phone because I felt like he was talking to other girls. he fell asleep and I checked his phone, he wasn't talking to other girls but he was following girls on Instagram that sold nudes and videos and he had so many porn searches. I was pregnant at the time with our son and I was already insecure about my body changing, whenever I tried to have sex with him he wouldn't get turned on so I felt like crap. And I go on his phone and find this, I felt even more insecure and ugly. I confronted him about it and he said sorry but I found them attractive. I told him that I didn't like that, that it made me feel like I wasn't doing my job as a woman so he promised and sweared he wouldn't do it again. two weeks after his soon was born there's all these random girls on his phone again and at this point I'm done and go off. I'm hurt that he did it again after I told him how I felt about it. Am I over exaggerating or do I have a right to be mad and have different feelings towards help? HELP!