So frustrated

Me and my husband have been TTC since last year. We had 2 miscarriages before we found out his sperm isn't healthy enough to produce a healthy child. I got tested to make sure I am fine. Instead of one egg at a time I drop 2. So my time is already shorter than everyone elses. And with the news that my husband has less than a 10% chance of getting me pregnant and it resulting in a healthy child I am dying inside. On top of all of that my sister is now pregnant and refuses to even aknowledge that she is pregnant. And she is also the only person who rubbed my miscarriage in my face repeatedly. I cant be happy for her no matter how hard I try. Is that normal?