Siblings

My sister is 27 and has 3 kids. She first got preggo when she was 22. I just told her that i am trying to conceive and she was really mad at me, i am 24 living with my boyfriend and i am very responsible. I am great with kids and my boyfriend and i are going on 3 yrs together. Is she wrong? Or should i just ignore her? She's my sister and i love her to death, i thought i could count on her to trust her with such things. She made me feel bad and made me wanna wait a bit longer. 😔