afraid to tell

so my first pregnancy turned into a big disappointment I ended up telling my sister and asking for help because i already was having a high risk pregnancy.. she too was pregnant at the time and wanted the all attention and told me to abort my baby! she also had my family turned their backs on me! they got over it of course when she was born but still no communication and I just can't stand my sisters! (it's all girls) my second pregnancy i told family and than i miscarried and now I'm pregnant again and just really don't want them to know! (because they stressed me out like crazy) any advice