Christian parents

I am about to be 24 years old in May, I am going to be 10 weeks on Sunday. I have not told my parents yet that I am pregnant. I am very scared to tell them. Not only cuz they are Christians but are Pastors. I told my boyfriend it's time to tell them. But he thinks it's better to wait till we have a place to live. I can't hide it anymore I'm constantly throwing up I have to stay quiet so my mom won't hear me I haven't even gone to the doctors yet because I have temporary medical if I want full coverage my mom needs to call her case worker so she can give it to me I can't do it on my own because it's my moms case. I been stressing out. My bf and I agreed to tell them this upcoming Sunday. I just don't know how to tell them I'm very nervous. I cry and pray to God to give me the courage. I just can't do it on my own I need my parents help.