Feeling confused

Sam • Mum of a 2yr old daughter, recovering from a complete molar pregnancy, Adoring fiancé, looking forward to TTC again
My sister is 37weeks pregnant, 
And I'm so so so happy for her, 
But after my recent loss I feel a sadness deep in my belly when I see her, 
She is getting induced next week and I'm worried about how I will feel with the little guy and also if the feelings will show through, 
Completely selfish of me I know 
I'm  just really struggling emotionally with how long we have to wait till we can try again :(