I told my boss I was pregnant. It didnt go well.

My boss never really liked me even though I never gave her a reason to dislike me. I only told her I was pregnant because I was having to run back and forth to the bathroom due to morning sickness. Come to find out she started talking bad about me to my best friend at work because I'm pregnant and 18. My friend of course told me everything so I left my boss a message saying how i was going to report her to HR. I am trying to have a positive pregnancy and will cut out anyone who thinks negatively of me just because I'm 18 and pregnant. Now I'm pretty sure my friend is mad at me cause our boss knows shes the one who told me.