Furious that my privacy was not respected

Amber
I really don't know what to do. My job wanted me to work up until labor but I hurt my foot & couldn't walk. My boss still wanted me to come in. I had my doctor request for me to be placed on maternity leave for this week. I was getting induced anyway. However after I went on leave my coworkers obnoxiously called me non-stop so I blocked them & set up a voicemail saying I am enjoying motherhood & would contact everyone at my convenience. Thanks for checking on me but I'm doing fine.
Well my aunt calls me to tell me that my boss calls her. So I'm confused. How did my boss get her number. After some thinking I realized that I left my emergency contact sheet incase I went into early labor at my desk however this sheet was placed in a drawer under other files. So she apparently went digging through my files. 
My aunt begins running off at the mouth & tells my boss everything that is going on with me. I asked her why didn't she just take her info & say I will have my neice call you back but no instead she tells her all of my business. She says oh I was just helping you keep your job. Your mom told me you had a hard time going on maternity leave. Your boss was really nosey. I said so you instead of ending the conversation, entertained her. I'm very furious with my aunt now. Why did she feel the need to help me keep my job?? Wth. 
I feel like my privacy was not respected what so ever. I feel like my boss was out of line. She didn't show very much concern while I was pregnant & hardly asked abt my pregnancy. Plus out of all the ppl. Why not contact my parents, my SO. Their names were on the sheet. They would know more than my aunt. 
I was planning to share the good news just on my terms. Now I'm pissed to the point that I don't want to even talk to my boss or share anything babywise with her or my coworkers. Or if I do share anything, it will be a picture & I have nothing else to say until I return from leave. 
I know I need to not worry abt this but I'm highly upset. What would you do if you were in my shoes?