Broken-hearted! ( long post)

I don't usually talk about my family issues but tonight my heart is broken...9 1/2 months ago my brother and his wife announced they were pregnant, everyone was so happy because it had taken them a while to conceive. 9 months ago I found that I was pregnant with my rainbow baby..I was so excited and wanted to tell everyone but kept quiet due to losing my last baby. When I was ready to announce around 10 weeks my brother and sister n law miscarried their baby!😢 My husband and I I kept quiet because we hurt so bad for them but at the same time we didn't feel that we should have to stifle our joy! We finally announced about 4 weeks later cause our little guy just couldn't be hidden any longer... Everyone was happy and excited but it hurt my heart because my sister in law cried and cried! Fast forward time to about 4 weeks ago at my baby shower..I noticed my sister in law had been crying..then all of a sudden her and her sister were gone! I found out later that day that she was again expecting and had started spotting that day!😢 We have held out hope but things have progressively gotten worse..my baby is a scheduled c section a week from today and she just found out that she lost this baby as well!! My heart is broken for them and I feel terrible...but should I feel guilty that Im absolutely over the moon to meet my rainbow baby a week from today? He deserves to be welcomed into this world full of excitement and love!!! Sorry so long of a post!