Double pregnancies

Shalyn • I'm 22 and a SAHM to a 14 month young little boy. Originally from New Zealand but living in Texas with my husband.
I found out a few weeks ago that I'm pregnant with #2 I'm 7+1 today, so super excited. I had a misscarage last October which was devastating for my husband and I. My sister just told me today that she was pregnant also, she is 9+1 so I'm even more excited to be pregnant at the same time as my sister. Her pregnancy on the other hand is high risk as it is an iud pregnancy. We are both hoping everything works out for her. She is very stressed about the whole thing but staying positive. Has anyone else been through her situation or know of anyone who has.