Mean sister

Linanne
About 6 weeks ago my sister was on my phone and I'm sure she saw my <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">pregnancy app</a> I changed my password so she wouldn't be able to go on my phone again. About a week or two later she asked me if I was pregnant, I denied and said no. I am 28 years old and engaged so I am not married yet. Anyway last night she started yelling at me sayingn I must be pregnant because I haven't started my  cleanse I had planned on doing. She is already being mean, nasty, and jealous and giving me dirty looks. She is 31 not married with no children. I had a miscarriage once and after that she made fun of me. How can I deal with her negativity? I plan on telling my family soon but I am afraid of how mean she is going to be because she is already starting and she wasn't nice the last time