Husband keeps lying about everything!

So this is pretty self explanatory but anyway my husband has been hiding things in his phone and when I find them he will lie to my face and tell me I'm crazy! This also isn't the first time this has happened! I literally feel as if he thinks I'm stupid and that I won t figure things out but it's getting to the point I just want him out but it's hard bc we have a 1 year old and I'm also 5 months pregnant! I just don't know what to do anymore! I've never been so stressed in my life!