To much on my mind😳

Hi ladies, need some advice and opinions..first of all ive been with my husband for 6 yrs and married for 5 yrs we have 2 daughters he works and im a stay at home mom, he always comes home around the same time if he diesnt he lets me know hes going to get home later than usual he never hides his phone..BUT I recently found out on his Snapchat he sent a message to one of his girl co workers it was a picture of her in a short dress it said "you look good" I told him about it he said it wasnt him..yea i know idk why he denied it if i clearly seen it and showed him the pic he got mad and told me i was thinking wrong then last night while I was charging my phone I used his to log into my instagram when I open it up I found that he was looking for 1 of his x girlfriends on there..like really idk why he does this in the years we been married this is the only times i find stuff like this on his phone I havent even tild him about that because I know hes going to say it wasnt him when it was it pisses me off that he thinks I wont find out and still lies about it 😒