MIL Sharing MC Loss w/ Family

I need to vent. When we were 7 weeks pregnant, we told immediate family. At 8 weeks I'm told at my checkup my baby is measuring under 5 weeks. I naturally tell the mothers but no other family. I also mention that I'm not telling others in the family until I have more answers. I started bleeding Monday and told my MIL to prepare herself. Today I had my 10 week ultrasound and finally had closure the baby was not growing. I have not shared the latest news yet to my MIL (bc I needed more time to tell her).  I just texted my sister in law to share the update. Turns out my MIL told her it was looking really bad for me sometime last week! My MIL also told my brother in law that the baby was gone...even though we still didn't know for sure.  Here's my issue. It's my husband and I's journey and heartbreak to share. Not hers! My husband and I should have the right to tell family how we want, when we want and set the tone. I'm am beyond angry. It's so unfair to me and my husband to have her start sharing the news of our loss when we ourselves didn't even have a concrete answer. Is she out of place or am I just hormonal dealing with this loss?