Sister-in-law having baby tomorrow and I don’t know how to handle it

My sister-in-law is having her baby tomorrow and I am having a hard time dealing with it. I should be 5 months pregnant right now but I lost my sweet baby at 6 weeks. I am so happy for my sister-in-law and the new baby, but I am also full of anxiety. It will be the first time I see a newborn since my loss and she is having the baby in the same hospital where I lost mine. Does anyone have any advice for me to get through this difficult time? I feel guilty for even having anxious thoughts about this but my loss is still weighing heavy on my heart and I just can’t control the sad feelings. Thanks.