Mt fiance watching porn.... help please

I am 9 weeks 2 days pregnant and my fiance is watching porn I have caught multiple sites on his phone.... I let it go for awhile until one day I was sleeping in bed with him and he was watching it I caught him..... here recently I was cooking in the kitchen the bathroom door is right near my stove I know what he sounds like breathing wise when we have sex. He was in the bathroom masterbating he always takes his phone into the bathroom with him. I became very angry he said why do 8 need that when I got you I was exercising I am not stupid he even went as far as the next day to do exercises in the bedroom before he went to work.... can anyone help me because every time I mention something about it he gets very angry. I am very insecure and just need help please