Has anyone ever experienced a subchorionic hematoma? I had one with my 2nd and it was so scary. I…

Has anyone ever experienced a subchorionic hematoma? I had one with my 2nd and it was so scary. I was laying down and my toddler wanted some juice. So I got up and started gushing out blood. There was just so much blood everywhere. I'm not sure if i got up too fast and maybe made a tear but it was only 3cm and it healed on its own a few weeks later. I'm praying the same doesn't happen with this pregnancy!