Hurt need advice

My bf woke me up the other night saying he was horny and I gave in and we had great sex.. I then just noticed on my history a couple of porn websites and the time matches up to before he got me up.. I feel horrible now because he was looking at other women before he had sex with me and I just feel fat ugly and pregnant and like these women are way more beautiful than me I just can't sleep I'm so hurt by this and the thought of him imagining himself doing someone else while he's doing me... What hurts the most is we just went over this a few weeks ago because I found the same thing in our history and I cried and let him know how hurt I was that he was watching porn behind my back and he literally goes and watched it again knowing how it makes me feel so insecure after he said it was dumb of him and he wouldn't do it again because he doesn't want to hurt me but it's like he's just leaving it in the history for me to see and I'm just like freaking out about it