My husband is turning into a pervert?! Help :(?

I dont know what to do, i met my husband when we were 24, we got married 2 years later, we had a nice normal healthy relationship, now we've been married for 1 year and a half and i am currently pregnant with our first child. He is turning into a different person and its disgusting! He's mean and so rough with me, during sex he gets turned on by hurting me and only wants to do anal, he even calls me words like "slut" "flithy pregnant whore" and now i refuse to have sex with him, then i caught him masturbating to really rauchy porn, as in, gangbang porn! and he was browsing at beastiality websites?! Then i looked through his phone while he was asleep and caught him texting pics of his penis to a co-worker ofhis and she sent him a pic of her vagina with a dildo in it. I confronted him and he yelled at me and nearly threw me. The other day we had a huge fight because he said, "It would be hot for another man to f*ck me while he watched" I slapped him and have not talked to him since! Then that same day i log into his "Work" email and hes emailing that co-worker telling her that young girls turn him on she asked him how young and he said, "young little cumslut 12 year olds that he can stretch out thier pu**ies" This was the last straw i took my things and left but feel so sick to my stomach, this behavior came out of no where!! And we are about to have a little girl together and now i am constantly thinking about what he would do to her?! But my family is very religious and does no believe in divorce...they would probably be very disappointed bt i am to ashamed to tell them the truth. Any advice...please no rude comments!