I just had a breakdown...

Because my step-sister (whom I’m really close with) is having her baby shower on September 1st and I’m so freaking excited... but yet something has just irked me and I just cried to my mom for the last 20 mins because I’m so happy for her but at the same time I’m a little jealous. I love my sister, and my baby nephew who I absolutely cannot wait till he’s here! But for some reason I’m just upset( not mad, just sad) idk how to explain it... has anyone else gone through this?