It's only natural for you to feel emotional hun, and your sil should be a bit more sensitive to that.
Shortly after I had the first mc I went to DH work Christmas party, and one of his female colleagues told me she knew how bad I felt. She had never had a mc, or even been pg. But she said that her dh sister gave birth to a baby, which sadly passed away after a few days. So this girl DH works with seemed to think that because her sil had lost a baby that she knew how I felt. I felt like screaming at her 'you really have no idea how ridiculous you sound! you have no idea at all, you stupid insensitive bitch!'. I know she was only trying to be nice, but how on earth she thought she knew how I was feeling is a mystery to me!
Some people talk without thinking though, and often fail to see that while we are telling everyone we are fine, we are actually in pieces. When I had the last mc in August I decided to stop telling people I was ok when I wasn't. So when people ask 'how are you feeling?', I answered with 'I feel terrible. I feel miserable. But please don't feel uncomfortable, I don't expect you to know what to say or do. Just expect that I won't be my usual cheerful self because I'm grieving'. I tried not to say it with a harsh or nasty tone, just friendly so they knew that I was hurting. People soon realised they needed to be more sensitive.
I hope you start feeling better soon hun.
xxx