Husband sneaking around

Hey guys so ive been married to my husband for a year now and tonight i was going thru his phone ( i know its not healthy but my gut was telling me to ) and i saw his emails from a dating app and i clicked on it and he made a profile a month ago messaging woman asking if they wanna fuck and sending them dick pics i feel so sick to my stomach right now and i also have severe anxiety and panic disoder so this isnt helping at all ..... hes asleep rn and i wanna punch him so bad but i wont how do i confront him about this i feel like being petty but i wanna be the bigger person i honestly feel like shit im so sick i cant believe this