Annoying family members

Ocie
So I'm 10 weeks pregnant with my first child. Noted I have 8 nieces and nephews that I helped practically raise. The oldest is 9. My brother girlfriend just had a baby 5 months ago and now she is pregnant again so now she thinks she can tell me about my pregnancy. It's so annoying. Every pregnancy is different or does she not know that. Am I being over emotional or should I tell her to mind her business? Besides she is my brother girlfriend/baby momma. When she  becomes wife then maybe I'll listen to her.