Crashing sex life help!

Since being pregnant I've been really insecure. My fiance told me today that he doesn't like having sex with me because I feel loose and the thought of vaginal discharge is gross. I held back the fact that it hurt me him saying this. Later he tried to have sex with me and I knew he wouldn't enjoy it so I told him I'm not in the mood which caused a huge fight. I honestly don't know what to do. Anyone else having these issues?