My empty due date is approaching

I would have been due 22nd April 2020 I was so excited to be able to share the news but before I got to I was experiencing the most horrible pain in my upper abdomen at 6/7 weeks pregnant I went for my scan at 8 weeks to find out my babys heart stopped beating at 7 weeks 6 days and I feel so selfish towards my sister as she is expecting her 6th baby next month? I always have the thoughts of “why does she get to have kids” and I can only have 1? My son is 17 months and isn’t getting the chance to be an older brother “why does she get to have a 6th child and my body fails to have 2?”