Sister help (trigger warning miscarriage)

Samantha • Mom to 2 kids and an angel baby in heaven.

So my sister-in-law has a miscarriage on the 14th (9 weeks pregnant) and I might be pregnant... I too have lost a child 1/7/2016 at 18 weeks and I’m scared of how to bring this up. I don’t have a clear positive yet, so I may be in the clear.. but what happens if I get pregnant this year? How would I go about bringing it up to her gently without hurting her feelings of bringing up her loss? I don’t want to hurt her in anyway if I end up getting pregnant/am pregnant.. help!!