totally irrelevant

i am 34 weeks tomorrow. i have been working alot less and been staying home recently, got tons of lonely hours at home and i did what i SHOULD NOT have done. went into my husbands hard drive, saw some photos that i shouldnt have seen, not to mention his old iphone which is nonworking but still had some msgs from when we were still dating at the time but during the holidays, he went back home to hawaii and i guess spent a mischievous one night stand with his old friend which he calls "dude" i mean we were only 2-3 months into the relationship so i guess i can forgive and let go of his past but i ran into another text msg of him and his friend and found out he still cannot let go of his ex. here i am trying to vacate my mind running errands, staying busy, working out at the gym but what i read is irreversible and its my fault.. but to find out he still has not let go of his past when we're about to start a new chapter leaves me very uncertain of our future... any advice on how i can cope with this during my last few weeks of pregnancy?...