Completely Heartbroken

I’m so heartbroken after finding out that my husband of 14 yrs has been seeing a 22 year old behind my back😭 I’m 36 and he’s 39 so I’m having a hard time understanding what they even have in common?! Idk what to do. I wish i had the strength to leave him behind😢 but we have two teenage daughters and a home together i don’t wanna lose that. Apparently the girl may be pregnant. I’m feeling lost,heartbroken,betrayed and so ugly b/c the girl he cheated with is so beautiful and young! Guys please send some encouraging words😣 i even been feeling suicidal sigh I’m just so tired 😓