Frustrated

I just need to rant a little bit.i have an almost 3 year old daughter and and almost 3 year old nephew, my sister and I gave birth to them only 23 days apart. While many would say how nice it would be to be pregnant at the same time must have been a wonderful experience however, it was not basically my entire pregnancy I was made to feel as if my pregnancy shouldn't have happened, even though my husband and I had been trying for several months I was told by multiple family members that I "stole my sisters thunder" and I should've waited until she had a baby before trying to start my own family. Fast forward to today and my husband and I have been trying for baby #2 for 4 months and my sister just announced her second pregnancy after telling everyone she didn't want to have anymore children, and we are being urged to stop ttc until she is further along in pregnancy or her baby is born. I am hurt and frustrated that it seems that only her happiness matters